/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 17:27:38,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 17:27:38,129 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 17:27:38,175 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 17:27:38,232 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-01 17:27:38,271 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 17:27:38,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 17:27:38,272 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 17:27:38,272 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 17:27:38,273 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 17:27:38,273 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 17:27:38,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 17:27:38,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 17:27:38,273 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 17:27:38,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 17:27:38,274 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 17:27:38,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 17:27:38,274 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 17:27:38,274 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 17:27:38,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 17:27:38,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 17:27:38,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 17:27:38,274 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 17:27:38,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 17:27:38,275 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 17:27:38,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 17:27:38,275 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 17:27:38,275 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 17:27:38,275 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 17:27:38,275 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 17:27:38,275 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:27:38,276 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 17:27:38,276 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 17:27:38,276 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 17:27:38,276 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 17:27:38,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 17:27:38,276 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 17:27:38,276 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 17:27:38,276 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 17:27:38,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 17:27:38,504 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 17:27:38,506 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 17:27:38,507 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 17:27:38,509 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 17:27:38,510 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl [2022-03-01 17:27:38,511 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/chromosome-subst.wvr.bpl' [2022-03-01 17:27:38,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 17:27:38,543 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 17:27:38,549 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 17:27:38,550 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 17:27:38,550 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 17:27:38,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:27:38" (1/1) ... [2022-03-01 17:27:38,566 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:27:38" (1/1) ... [2022-03-01 17:27:38,571 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 17:27:38,572 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 17:27:38,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 17:27:38,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 17:27:38,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 17:27:38,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:27:38" (1/1) ... [2022-03-01 17:27:38,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:27:38" (1/1) ... [2022-03-01 17:27:38,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:27:38" (1/1) ... [2022-03-01 17:27:38,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:27:38" (1/1) ... [2022-03-01 17:27:38,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:27:38" (1/1) ... [2022-03-01 17:27:38,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:27:38" (1/1) ... [2022-03-01 17:27:38,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:27:38" (1/1) ... [2022-03-01 17:27:38,586 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 17:27:38,587 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 17:27:38,587 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 17:27:38,587 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 17:27:38,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:27:38" (1/1) ... [2022-03-01 17:27:38,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:27:38,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:38,624 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-01 17:27:38,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-01 17:27:38,667 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 17:27:38,667 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 17:27:38,667 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 17:27:38,667 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 17:27:38,667 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 17:27:38,668 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 17:27:38,668 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 17:27:38,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 17:27:38,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 17:27:38,669 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-03-01 17:27:38,669 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-03-01 17:27:38,669 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-03-01 17:27:38,669 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 17:27:38,718 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 17:27:38,720 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 17:27:38,813 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 17:27:38,852 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 17:27:38,852 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-01 17:27:38,854 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:27:38 BoogieIcfgContainer [2022-03-01 17:27:38,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 17:27:38,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 17:27:38,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 17:27:38,860 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 17:27:38,860 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:27:38" (1/2) ... [2022-03-01 17:27:38,861 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16fe3481 and model type chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 05:27:38, skipping insertion in model container [2022-03-01 17:27:38,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:27:38" (2/2) ... [2022-03-01 17:27:38,863 INFO L111 eAbstractionObserver]: Analyzing ICFG chromosome-subst.wvr.bpl [2022-03-01 17:27:38,867 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 17:27:38,867 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 17:27:38,867 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 17:27:38,867 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 17:27:38,929 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-03-01 17:27:38,980 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 17:27:38,988 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 17:27:38,989 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-03-01 17:27:38,998 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 25 transitions, 74 flow [2022-03-01 17:27:39,053 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:39,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:39,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:27:39,068 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:39,069 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:39,069 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:39,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:39,074 INFO L85 PathProgramCache]: Analyzing trace with hash 322758138, now seen corresponding path program 1 times [2022-03-01 17:27:39,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:39,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296294655] [2022-03-01 17:27:39,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:39,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:39,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:39,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:39,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296294655] [2022-03-01 17:27:39,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296294655] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:27:39,286 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:27:39,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:27:39,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667775794] [2022-03-01 17:27:39,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:27:39,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:27:39,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:39,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:27:39,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:27:39,344 INFO L87 Difference]: Start difference. First operand has 108 states, 107 states have (on average 2.878504672897196) internal successors, (308), 107 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:39,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:39,468 INFO L93 Difference]: Finished difference Result 248 states and 694 transitions. [2022-03-01 17:27:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:27:39,471 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:27:39,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:39,482 INFO L225 Difference]: With dead ends: 248 [2022-03-01 17:27:39,482 INFO L226 Difference]: Without dead ends: 248 [2022-03-01 17:27:39,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:27:39,487 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 33 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:39,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 19 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:27:39,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-01 17:27:39,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 129. [2022-03-01 17:27:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.9609375) internal successors, (379), 128 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 379 transitions. [2022-03-01 17:27:39,568 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 379 transitions. Word has length 17 [2022-03-01 17:27:39,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:39,569 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 379 transitions. [2022-03-01 17:27:39,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:39,569 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 379 transitions. [2022-03-01 17:27:39,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:27:39,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:39,571 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:39,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 17:27:39,572 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:39,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:39,572 INFO L85 PathProgramCache]: Analyzing trace with hash -515592662, now seen corresponding path program 2 times [2022-03-01 17:27:39,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:39,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405385899] [2022-03-01 17:27:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:39,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:39,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:39,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405385899] [2022-03-01 17:27:39,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405385899] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:27:39,627 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:27:39,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:27:39,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792503680] [2022-03-01 17:27:39,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:27:39,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:27:39,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:39,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:27:39,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:27:39,631 INFO L87 Difference]: Start difference. First operand 129 states and 379 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:39,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:39,687 INFO L93 Difference]: Finished difference Result 206 states and 576 transitions. [2022-03-01 17:27:39,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:27:39,689 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:27:39,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:39,691 INFO L225 Difference]: With dead ends: 206 [2022-03-01 17:27:39,692 INFO L226 Difference]: Without dead ends: 183 [2022-03-01 17:27:39,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:27:39,693 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:39,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 21 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:27:39,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-01 17:27:39,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2022-03-01 17:27:39,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:39,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2022-03-01 17:27:39,707 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2022-03-01 17:27:39,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:39,707 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2022-03-01 17:27:39,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:39,708 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2022-03-01 17:27:39,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:27:39,709 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:39,709 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:39,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 17:27:39,710 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:39,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:39,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1307213656, now seen corresponding path program 3 times [2022-03-01 17:27:39,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:39,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708068592] [2022-03-01 17:27:39,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:39,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:39,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:39,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:39,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:39,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708068592] [2022-03-01 17:27:39,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708068592] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:27:39,747 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:27:39,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:27:39,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003583483] [2022-03-01 17:27:39,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:27:39,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:27:39,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:39,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:27:39,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:27:39,749 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:39,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:39,803 INFO L93 Difference]: Finished difference Result 141 states and 406 transitions. [2022-03-01 17:27:39,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:27:39,803 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:27:39,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:39,804 INFO L225 Difference]: With dead ends: 141 [2022-03-01 17:27:39,805 INFO L226 Difference]: Without dead ends: 141 [2022-03-01 17:27:39,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:27:39,806 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:39,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 18 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:27:39,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-01 17:27:39,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 129. [2022-03-01 17:27:39,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 2.890625) internal successors, (370), 128 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:39,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 370 transitions. [2022-03-01 17:27:39,816 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 370 transitions. Word has length 17 [2022-03-01 17:27:39,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:39,816 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 370 transitions. [2022-03-01 17:27:39,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:39,816 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 370 transitions. [2022-03-01 17:27:39,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:27:39,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:39,818 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:39,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 17:27:39,818 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:39,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:39,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1870215385, now seen corresponding path program 1 times [2022-03-01 17:27:39,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:39,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992797773] [2022-03-01 17:27:39,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:39,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:27:39,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:39,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992797773] [2022-03-01 17:27:39,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992797773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:27:39,920 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:27:39,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-01 17:27:39,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078304304] [2022-03-01 17:27:39,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:27:39,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:27:39,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:39,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:27:39,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:27:39,923 INFO L87 Difference]: Start difference. First operand 129 states and 370 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:40,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:40,030 INFO L93 Difference]: Finished difference Result 265 states and 764 transitions. [2022-03-01 17:27:40,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:27:40,030 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 17:27:40,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:40,033 INFO L225 Difference]: With dead ends: 265 [2022-03-01 17:27:40,034 INFO L226 Difference]: Without dead ends: 238 [2022-03-01 17:27:40,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:27:40,046 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 32 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:40,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 22 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:27:40,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-03-01 17:27:40,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 178. [2022-03-01 17:27:40,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 2.9152542372881354) internal successors, (516), 177 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:40,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 516 transitions. [2022-03-01 17:27:40,066 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 516 transitions. Word has length 18 [2022-03-01 17:27:40,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:40,066 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 516 transitions. [2022-03-01 17:27:40,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:40,067 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 516 transitions. [2022-03-01 17:27:40,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:27:40,068 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:40,068 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:40,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-01 17:27:40,068 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:40,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:40,069 INFO L85 PathProgramCache]: Analyzing trace with hash 483254867, now seen corresponding path program 2 times [2022-03-01 17:27:40,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:40,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373598449] [2022-03-01 17:27:40,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:40,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:27:40,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:40,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373598449] [2022-03-01 17:27:40,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373598449] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:27:40,263 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:27:40,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-01 17:27:40,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48989740] [2022-03-01 17:27:40,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:27:40,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:27:40,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:40,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:27:40,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:27:40,266 INFO L87 Difference]: Start difference. First operand 178 states and 516 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:40,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:40,435 INFO L93 Difference]: Finished difference Result 372 states and 1056 transitions. [2022-03-01 17:27:40,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:27:40,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 17:27:40,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:40,439 INFO L225 Difference]: With dead ends: 372 [2022-03-01 17:27:40,440 INFO L226 Difference]: Without dead ends: 345 [2022-03-01 17:27:40,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:27:40,444 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:40,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 38 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:27:40,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-01 17:27:40,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 195. [2022-03-01 17:27:40,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0412371134020617) internal successors, (590), 194 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:40,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 590 transitions. [2022-03-01 17:27:40,472 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 590 transitions. Word has length 18 [2022-03-01 17:27:40,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:40,472 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 590 transitions. [2022-03-01 17:27:40,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 590 transitions. [2022-03-01 17:27:40,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:27:40,477 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:40,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:40,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-01 17:27:40,478 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:40,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:40,479 INFO L85 PathProgramCache]: Analyzing trace with hash 498715663, now seen corresponding path program 3 times [2022-03-01 17:27:40,479 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:40,479 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762934052] [2022-03-01 17:27:40,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:40,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:27:40,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:40,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762934052] [2022-03-01 17:27:40,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762934052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:27:40,626 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:27:40,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-01 17:27:40,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429063854] [2022-03-01 17:27:40,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:27:40,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:27:40,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:40,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:27:40,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:27:40,628 INFO L87 Difference]: Start difference. First operand 195 states and 590 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:40,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:40,784 INFO L93 Difference]: Finished difference Result 372 states and 1031 transitions. [2022-03-01 17:27:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:27:40,787 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 17:27:40,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:40,790 INFO L225 Difference]: With dead ends: 372 [2022-03-01 17:27:40,790 INFO L226 Difference]: Without dead ends: 332 [2022-03-01 17:27:40,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:27:40,792 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:40,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 40 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:27:40,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-03-01 17:27:40,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 195. [2022-03-01 17:27:40,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 3.0103092783505154) internal successors, (584), 194 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:40,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 584 transitions. [2022-03-01 17:27:40,805 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 584 transitions. Word has length 18 [2022-03-01 17:27:40,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:40,805 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 584 transitions. [2022-03-01 17:27:40,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:40,806 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 584 transitions. [2022-03-01 17:27:40,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:27:40,807 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:40,807 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:40,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-01 17:27:40,808 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:40,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:40,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1735391831, now seen corresponding path program 4 times [2022-03-01 17:27:40,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:40,809 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151482555] [2022-03-01 17:27:40,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:40,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:40,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:27:40,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:40,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151482555] [2022-03-01 17:27:40,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151482555] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:27:40,904 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:27:40,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-01 17:27:40,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504626768] [2022-03-01 17:27:40,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:27:40,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:27:40,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:40,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:27:40,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:27:40,905 INFO L87 Difference]: Start difference. First operand 195 states and 584 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:41,016 INFO L93 Difference]: Finished difference Result 318 states and 896 transitions. [2022-03-01 17:27:41,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:27:41,017 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 17:27:41,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:41,019 INFO L225 Difference]: With dead ends: 318 [2022-03-01 17:27:41,019 INFO L226 Difference]: Without dead ends: 255 [2022-03-01 17:27:41,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:27:41,020 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:41,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 31 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:27:41,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-01 17:27:41,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 195. [2022-03-01 17:27:41,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9536082474226806) internal successors, (573), 194 states have internal predecessors, (573), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 573 transitions. [2022-03-01 17:27:41,028 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 573 transitions. Word has length 18 [2022-03-01 17:27:41,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:41,028 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 573 transitions. [2022-03-01 17:27:41,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,028 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 573 transitions. [2022-03-01 17:27:41,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:27:41,029 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:41,029 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:41,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-01 17:27:41,029 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:41,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:41,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1322929447, now seen corresponding path program 1 times [2022-03-01 17:27:41,030 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:41,030 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063916107] [2022-03-01 17:27:41,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:41,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:41,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:27:41,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:41,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063916107] [2022-03-01 17:27:41,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063916107] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:27:41,064 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:27:41,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:27:41,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285036330] [2022-03-01 17:27:41,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:27:41,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:27:41,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:41,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:27:41,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:27:41,066 INFO L87 Difference]: Start difference. First operand 195 states and 573 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:41,129 INFO L93 Difference]: Finished difference Result 285 states and 816 transitions. [2022-03-01 17:27:41,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:27:41,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:27:41,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:41,132 INFO L225 Difference]: With dead ends: 285 [2022-03-01 17:27:41,132 INFO L226 Difference]: Without dead ends: 261 [2022-03-01 17:27:41,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:27:41,133 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:41,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 36 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:27:41,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-03-01 17:27:41,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 183. [2022-03-01 17:27:41,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2022-03-01 17:27:41,140 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2022-03-01 17:27:41,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:41,140 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2022-03-01 17:27:41,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,141 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2022-03-01 17:27:41,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:27:41,141 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:41,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:41,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-01 17:27:41,142 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:41,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:41,142 INFO L85 PathProgramCache]: Analyzing trace with hash 239156717, now seen corresponding path program 1 times [2022-03-01 17:27:41,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:41,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552053185] [2022-03-01 17:27:41,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:41,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:27:41,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:41,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552053185] [2022-03-01 17:27:41,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552053185] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:27:41,199 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:27:41,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:27:41,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616560223] [2022-03-01 17:27:41,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:27:41,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:27:41,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:41,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:27:41,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:27:41,203 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:41,271 INFO L93 Difference]: Finished difference Result 279 states and 816 transitions. [2022-03-01 17:27:41,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:27:41,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:27:41,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:41,273 INFO L225 Difference]: With dead ends: 279 [2022-03-01 17:27:41,273 INFO L226 Difference]: Without dead ends: 279 [2022-03-01 17:27:41,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:27:41,274 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 34 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:41,274 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 33 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:27:41,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-01 17:27:41,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 183. [2022-03-01 17:27:41,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.9505494505494507) internal successors, (537), 182 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 537 transitions. [2022-03-01 17:27:41,282 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 537 transitions. Word has length 19 [2022-03-01 17:27:41,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:41,282 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 537 transitions. [2022-03-01 17:27:41,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,282 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 537 transitions. [2022-03-01 17:27:41,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:27:41,283 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:41,283 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:41,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-01 17:27:41,284 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:41,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:41,284 INFO L85 PathProgramCache]: Analyzing trace with hash 844392021, now seen corresponding path program 2 times [2022-03-01 17:27:41,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:41,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088881241] [2022-03-01 17:27:41,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:41,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:27:41,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:41,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088881241] [2022-03-01 17:27:41,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088881241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:27:41,323 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:27:41,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:27:41,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571566982] [2022-03-01 17:27:41,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:27:41,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:27:41,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:41,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:27:41,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:27:41,325 INFO L87 Difference]: Start difference. First operand 183 states and 537 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:41,392 INFO L93 Difference]: Finished difference Result 333 states and 939 transitions. [2022-03-01 17:27:41,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:27:41,392 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:27:41,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:41,394 INFO L225 Difference]: With dead ends: 333 [2022-03-01 17:27:41,394 INFO L226 Difference]: Without dead ends: 321 [2022-03-01 17:27:41,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:27:41,395 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:41,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 30 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:27:41,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2022-03-01 17:27:41,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 201. [2022-03-01 17:27:41,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.955) internal successors, (591), 200 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 591 transitions. [2022-03-01 17:27:41,403 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 591 transitions. Word has length 19 [2022-03-01 17:27:41,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:41,403 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 591 transitions. [2022-03-01 17:27:41,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,404 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 591 transitions. [2022-03-01 17:27:41,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:27:41,404 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:41,404 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:41,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-01 17:27:41,405 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:41,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:41,405 INFO L85 PathProgramCache]: Analyzing trace with hash -11164707, now seen corresponding path program 2 times [2022-03-01 17:27:41,405 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:41,405 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702277379] [2022-03-01 17:27:41,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:41,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:41,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:27:41,441 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:41,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702277379] [2022-03-01 17:27:41,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702277379] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:27:41,441 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:27:41,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:27:41,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638375224] [2022-03-01 17:27:41,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:27:41,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:27:41,442 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:41,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:27:41,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:27:41,442 INFO L87 Difference]: Start difference. First operand 201 states and 591 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:41,519 INFO L93 Difference]: Finished difference Result 297 states and 852 transitions. [2022-03-01 17:27:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:27:41,523 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:27:41,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:41,525 INFO L225 Difference]: With dead ends: 297 [2022-03-01 17:27:41,525 INFO L226 Difference]: Without dead ends: 297 [2022-03-01 17:27:41,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:27:41,526 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:41,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 30 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:27:41,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-03-01 17:27:41,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 201. [2022-03-01 17:27:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.955) internal successors, (591), 200 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 591 transitions. [2022-03-01 17:27:41,533 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 591 transitions. Word has length 19 [2022-03-01 17:27:41,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:41,534 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 591 transitions. [2022-03-01 17:27:41,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,534 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 591 transitions. [2022-03-01 17:27:41,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:27:41,535 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:41,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:41,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-01 17:27:41,536 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:41,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:41,536 INFO L85 PathProgramCache]: Analyzing trace with hash 575750895, now seen corresponding path program 3 times [2022-03-01 17:27:41,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:41,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249340920] [2022-03-01 17:27:41,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:41,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:27:41,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:41,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249340920] [2022-03-01 17:27:41,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249340920] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:27:41,587 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:27:41,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:27:41,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589720343] [2022-03-01 17:27:41,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:27:41,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:27:41,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:41,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:27:41,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:27:41,589 INFO L87 Difference]: Start difference. First operand 201 states and 591 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:41,638 INFO L93 Difference]: Finished difference Result 219 states and 632 transitions. [2022-03-01 17:27:41,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:27:41,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:27:41,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:41,641 INFO L225 Difference]: With dead ends: 219 [2022-03-01 17:27:41,641 INFO L226 Difference]: Without dead ends: 206 [2022-03-01 17:27:41,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:27:41,641 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:41,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 21 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:27:41,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-01 17:27:41,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 188. [2022-03-01 17:27:41,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9572192513368982) internal successors, (553), 187 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 553 transitions. [2022-03-01 17:27:41,648 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 553 transitions. Word has length 19 [2022-03-01 17:27:41,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:41,648 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 553 transitions. [2022-03-01 17:27:41,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,648 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 553 transitions. [2022-03-01 17:27:41,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:27:41,649 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:41,649 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:41,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-01 17:27:41,650 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:41,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:41,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1371281447, now seen corresponding path program 3 times [2022-03-01 17:27:41,650 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:41,650 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287831640] [2022-03-01 17:27:41,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:41,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:41,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:41,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:27:41,706 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:41,706 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287831640] [2022-03-01 17:27:41,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287831640] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:27:41,706 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:27:41,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:27:41,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601846735] [2022-03-01 17:27:41,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:27:41,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:27:41,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:41,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:27:41,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:27:41,707 INFO L87 Difference]: Start difference. First operand 188 states and 553 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:41,770 INFO L93 Difference]: Finished difference Result 267 states and 774 transitions. [2022-03-01 17:27:41,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:27:41,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:27:41,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:41,772 INFO L225 Difference]: With dead ends: 267 [2022-03-01 17:27:41,772 INFO L226 Difference]: Without dead ends: 267 [2022-03-01 17:27:41,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:27:41,773 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:41,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 29 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:27:41,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-01 17:27:41,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 189. [2022-03-01 17:27:41,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-03-01 17:27:41,780 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2022-03-01 17:27:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:41,781 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-03-01 17:27:41,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-03-01 17:27:41,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:27:41,784 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:41,784 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:41,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-01 17:27:41,784 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:41,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:41,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1379795667, now seen corresponding path program 4 times [2022-03-01 17:27:41,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:41,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783489184] [2022-03-01 17:27:41,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:41,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:41,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:27:41,861 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:41,861 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783489184] [2022-03-01 17:27:41,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783489184] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:27:41,861 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:27:41,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:27:41,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489726991] [2022-03-01 17:27:41,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:27:41,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:27:41,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:41,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:27:41,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:27:41,863 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:41,957 INFO L93 Difference]: Finished difference Result 207 states and 591 transitions. [2022-03-01 17:27:41,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:27:41,958 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:27:41,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:41,959 INFO L225 Difference]: With dead ends: 207 [2022-03-01 17:27:41,959 INFO L226 Difference]: Without dead ends: 195 [2022-03-01 17:27:41,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:27:41,960 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:41,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 29 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:27:41,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-01 17:27:41,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-03-01 17:27:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.922680412371134) internal successors, (567), 194 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 567 transitions. [2022-03-01 17:27:41,966 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 567 transitions. Word has length 19 [2022-03-01 17:27:41,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:41,966 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 567 transitions. [2022-03-01 17:27:41,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:41,966 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 567 transitions. [2022-03-01 17:27:41,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:27:41,967 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:41,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:41,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-01 17:27:41,967 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:41,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:41,968 INFO L85 PathProgramCache]: Analyzing trace with hash 699498161, now seen corresponding path program 5 times [2022-03-01 17:27:41,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:41,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626385624] [2022-03-01 17:27:41,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:41,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:27:42,008 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:42,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626385624] [2022-03-01 17:27:42,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626385624] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:27:42,009 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:27:42,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:27:42,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290964160] [2022-03-01 17:27:42,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:27:42,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:27:42,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:42,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:27:42,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:27:42,010 INFO L87 Difference]: Start difference. First operand 195 states and 567 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:42,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:42,082 INFO L93 Difference]: Finished difference Result 214 states and 623 transitions. [2022-03-01 17:27:42,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:27:42,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:27:42,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:42,084 INFO L225 Difference]: With dead ends: 214 [2022-03-01 17:27:42,084 INFO L226 Difference]: Without dead ends: 214 [2022-03-01 17:27:42,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:27:42,085 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:42,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:27:42,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-03-01 17:27:42,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 189. [2022-03-01 17:27:42,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:42,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-03-01 17:27:42,090 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2022-03-01 17:27:42,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:42,090 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-03-01 17:27:42,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:42,091 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-03-01 17:27:42,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-01 17:27:42,091 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:42,091 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:42,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-01 17:27:42,092 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:42,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:42,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1772583541, now seen corresponding path program 6 times [2022-03-01 17:27:42,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:42,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958229003] [2022-03-01 17:27:42,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:42,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:27:42,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:42,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958229003] [2022-03-01 17:27:42,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958229003] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:27:42,123 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:27:42,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:27:42,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026029413] [2022-03-01 17:27:42,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:27:42,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:27:42,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:42,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:27:42,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:27:42,125 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:42,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:42,190 INFO L93 Difference]: Finished difference Result 208 states and 605 transitions. [2022-03-01 17:27:42,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:27:42,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-03-01 17:27:42,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:42,191 INFO L225 Difference]: With dead ends: 208 [2022-03-01 17:27:42,192 INFO L226 Difference]: Without dead ends: 208 [2022-03-01 17:27:42,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:27:42,192 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 36 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:42,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 33 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:27:42,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-03-01 17:27:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 189. [2022-03-01 17:27:42,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9202127659574466) internal successors, (549), 188 states have internal predecessors, (549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:42,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 549 transitions. [2022-03-01 17:27:42,198 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 549 transitions. Word has length 19 [2022-03-01 17:27:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:42,199 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 549 transitions. [2022-03-01 17:27:42,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 549 transitions. [2022-03-01 17:27:42,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-01 17:27:42,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:42,200 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:42,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-01 17:27:42,200 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:42,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:42,200 INFO L85 PathProgramCache]: Analyzing trace with hash -356903725, now seen corresponding path program 1 times [2022-03-01 17:27:42,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:42,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935352697] [2022-03-01 17:27:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:42,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:42,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:27:42,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:42,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935352697] [2022-03-01 17:27:42,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935352697] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:42,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078225903] [2022-03-01 17:27:42,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:42,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:42,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:42,275 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:42,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 17:27:42,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:42,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 8 conjunts are in the unsatisfiable core [2022-03-01 17:27:42,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:27:42,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:42,729 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:27:42,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078225903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:42,730 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:42,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2022-03-01 17:27:42,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600629903] [2022-03-01 17:27:42,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:42,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:27:42,730 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:42,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:27:42,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:27:42,731 INFO L87 Difference]: Start difference. First operand 189 states and 549 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:43,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:43,016 INFO L93 Difference]: Finished difference Result 618 states and 1788 transitions. [2022-03-01 17:27:43,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:27:43,017 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-03-01 17:27:43,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:43,018 INFO L225 Difference]: With dead ends: 618 [2022-03-01 17:27:43,019 INFO L226 Difference]: Without dead ends: 288 [2022-03-01 17:27:43,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:27:43,020 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 168 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:43,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 59 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:27:43,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-01 17:27:43,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 282. [2022-03-01 17:27:43,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.9359430604982206) internal successors, (825), 281 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:43,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 825 transitions. [2022-03-01 17:27:43,028 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 825 transitions. Word has length 20 [2022-03-01 17:27:43,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:43,028 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 825 transitions. [2022-03-01 17:27:43,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:43,028 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 825 transitions. [2022-03-01 17:27:43,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-01 17:27:43,029 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:43,029 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:43,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:43,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-01 17:27:43,236 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:43,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:43,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1404037396, now seen corresponding path program 2 times [2022-03-01 17:27:43,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:43,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660960844] [2022-03-01 17:27:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:43,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:43,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:27:43,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:43,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660960844] [2022-03-01 17:27:43,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660960844] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:43,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670681901] [2022-03-01 17:27:43,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:27:43,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:43,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:43,328 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:43,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 17:27:43,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:27:43,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:43,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-01 17:27:43,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:27:43,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:27:43,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670681901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:43,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:43,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2022-03-01 17:27:43,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285958708] [2022-03-01 17:27:43,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:43,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-01 17:27:43,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:43,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-01 17:27:43,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-01 17:27:43,628 INFO L87 Difference]: Start difference. First operand 282 states and 825 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:43,841 INFO L93 Difference]: Finished difference Result 406 states and 1187 transitions. [2022-03-01 17:27:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-01 17:27:43,841 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-03-01 17:27:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:43,843 INFO L225 Difference]: With dead ends: 406 [2022-03-01 17:27:43,843 INFO L226 Difference]: Without dead ends: 313 [2022-03-01 17:27:43,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:27:43,844 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 121 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:43,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 49 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:27:43,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-03-01 17:27:43,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2022-03-01 17:27:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.9391025641025643) internal successors, (917), 312 states have internal predecessors, (917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:43,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 917 transitions. [2022-03-01 17:27:43,852 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 917 transitions. Word has length 23 [2022-03-01 17:27:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:43,852 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 917 transitions. [2022-03-01 17:27:43,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:43,853 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 917 transitions. [2022-03-01 17:27:43,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:27:43,853 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:43,854 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:43,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-01 17:27:44,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-01 17:27:44,067 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:44,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:44,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1839078163, now seen corresponding path program 3 times [2022-03-01 17:27:44,068 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:44,068 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763313922] [2022-03-01 17:27:44,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:44,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:44,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:44,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:44,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763313922] [2022-03-01 17:27:44,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763313922] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:44,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233649285] [2022-03-01 17:27:44,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:27:44,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:44,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:44,380 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:44,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 17:27:44,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:27:44,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:44,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:27:44,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:44,542 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:44,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:27:44,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:44,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:27:44,845 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:44,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:45,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:45,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-01 17:27:45,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:45,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-03-01 17:27:45,572 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:45,573 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2022-03-01 17:27:45,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:45,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233649285] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:45,671 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:45,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:27:45,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10826393] [2022-03-01 17:27:45,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:45,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:27:45,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:45,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:27:45,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:27:45,674 INFO L87 Difference]: Start difference. First operand 313 states and 917 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:46,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:46,184 INFO L93 Difference]: Finished difference Result 541 states and 1585 transitions. [2022-03-01 17:27:46,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:27:46,185 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:27:46,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:46,188 INFO L225 Difference]: With dead ends: 541 [2022-03-01 17:27:46,188 INFO L226 Difference]: Without dead ends: 492 [2022-03-01 17:27:46,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:27:46,189 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 85 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:46,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 233 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 474 Invalid, 0 Unknown, 23 Unchecked, 0.3s Time] [2022-03-01 17:27:46,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-03-01 17:27:46,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 343. [2022-03-01 17:27:46,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.8771929824561404) internal successors, (984), 342 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:46,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 984 transitions. [2022-03-01 17:27:46,200 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 984 transitions. Word has length 24 [2022-03-01 17:27:46,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:46,200 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 984 transitions. [2022-03-01 17:27:46,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:46,200 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 984 transitions. [2022-03-01 17:27:46,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:27:46,202 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:46,202 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:46,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:46,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:46,404 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:46,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:46,404 INFO L85 PathProgramCache]: Analyzing trace with hash 3177783, now seen corresponding path program 4 times [2022-03-01 17:27:46,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:46,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210324243] [2022-03-01 17:27:46,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:46,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:46,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:46,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210324243] [2022-03-01 17:27:46,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210324243] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:46,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021267601] [2022-03-01 17:27:46,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:27:46,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:46,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:46,660 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:46,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 17:27:46,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:27:46,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:46,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:27:46,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:46,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:46,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-03-01 17:27:47,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:47,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:27:47,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-01 17:27:47,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:47,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:47,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:47,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-01 17:27:47,806 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:47,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 73 [2022-03-01 17:27:47,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:47,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 57 [2022-03-01 17:27:47,918 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:47,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021267601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:47,918 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:47,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:27:47,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573857666] [2022-03-01 17:27:47,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:47,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:27:47,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:47,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:27:47,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:27:47,920 INFO L87 Difference]: Start difference. First operand 343 states and 984 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:48,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:48,834 INFO L93 Difference]: Finished difference Result 769 states and 2140 transitions. [2022-03-01 17:27:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:27:48,835 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:27:48,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:48,839 INFO L225 Difference]: With dead ends: 769 [2022-03-01 17:27:48,839 INFO L226 Difference]: Without dead ends: 749 [2022-03-01 17:27:48,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:27:48,840 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 134 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:48,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 329 Invalid, 1118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 870 Invalid, 0 Unknown, 237 Unchecked, 0.5s Time] [2022-03-01 17:27:48,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2022-03-01 17:27:48,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 388. [2022-03-01 17:27:48,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 2.8733850129198966) internal successors, (1112), 387 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:48,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1112 transitions. [2022-03-01 17:27:48,859 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1112 transitions. Word has length 24 [2022-03-01 17:27:48,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:48,859 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 1112 transitions. [2022-03-01 17:27:48,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:48,859 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1112 transitions. [2022-03-01 17:27:48,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:27:48,860 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:48,860 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:48,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:49,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:49,075 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:49,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:49,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1540969225, now seen corresponding path program 5 times [2022-03-01 17:27:49,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:49,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596046752] [2022-03-01 17:27:49,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:49,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:49,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:49,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:27:49,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:49,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596046752] [2022-03-01 17:27:49,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596046752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:49,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184315784] [2022-03-01 17:27:49,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:27:49,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:49,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:49,252 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:49,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 17:27:49,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:27:49,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:49,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:27:49,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:49,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:27:49,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:27:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:27:49,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:49,968 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:49,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-01 17:27:50,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:50,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-03-01 17:27:50,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:50,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2022-03-01 17:27:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:27:50,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184315784] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:50,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:50,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:27:50,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192721608] [2022-03-01 17:27:50,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:50,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:27:50,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:50,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:27:50,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:27:50,246 INFO L87 Difference]: Start difference. First operand 388 states and 1112 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:50,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:50,538 INFO L93 Difference]: Finished difference Result 594 states and 1726 transitions. [2022-03-01 17:27:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:27:50,538 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:27:50,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:50,541 INFO L225 Difference]: With dead ends: 594 [2022-03-01 17:27:50,541 INFO L226 Difference]: Without dead ends: 567 [2022-03-01 17:27:50,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:27:50,542 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 114 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:50,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 156 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 474 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-03-01 17:27:50,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-03-01 17:27:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 398. [2022-03-01 17:27:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 397 states have (on average 2.8690176322418135) internal successors, (1139), 397 states have internal predecessors, (1139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:50,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 1139 transitions. [2022-03-01 17:27:50,553 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 1139 transitions. Word has length 24 [2022-03-01 17:27:50,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:50,554 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 1139 transitions. [2022-03-01 17:27:50,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:50,554 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 1139 transitions. [2022-03-01 17:27:50,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:27:50,556 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:50,556 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:50,580 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:50,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:50,780 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:50,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:50,780 INFO L85 PathProgramCache]: Analyzing trace with hash -263182055, now seen corresponding path program 6 times [2022-03-01 17:27:50,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:50,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978303495] [2022-03-01 17:27:50,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:50,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:50,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:50,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978303495] [2022-03-01 17:27:50,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978303495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:50,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568523722] [2022-03-01 17:27:50,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:27:50,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:50,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:50,978 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:50,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 17:27:51,017 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:27:51,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:51,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:27:51,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:51,122 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:51,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-03-01 17:27:51,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:51,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:27:51,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-01 17:27:51,443 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:51,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:52,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:52,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-03-01 17:27:52,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:52,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-03-01 17:27:52,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:52,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-03-01 17:27:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:52,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568523722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:52,392 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:52,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:27:52,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702179844] [2022-03-01 17:27:52,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:52,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:27:52,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:52,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:27:52,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:27:52,394 INFO L87 Difference]: Start difference. First operand 398 states and 1139 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:52,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:52,919 INFO L93 Difference]: Finished difference Result 660 states and 1915 transitions. [2022-03-01 17:27:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:27:52,920 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:27:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:52,922 INFO L225 Difference]: With dead ends: 660 [2022-03-01 17:27:52,922 INFO L226 Difference]: Without dead ends: 629 [2022-03-01 17:27:52,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:27:52,923 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 79 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:52,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 228 Invalid, 919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 614 Invalid, 0 Unknown, 291 Unchecked, 0.3s Time] [2022-03-01 17:27:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-03-01 17:27:52,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 402. [2022-03-01 17:27:52,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.865336658354115) internal successors, (1149), 401 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:52,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1149 transitions. [2022-03-01 17:27:52,935 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1149 transitions. Word has length 24 [2022-03-01 17:27:52,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:52,935 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1149 transitions. [2022-03-01 17:27:52,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:52,936 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1149 transitions. [2022-03-01 17:27:52,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:27:52,937 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:52,937 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:52,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:53,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:53,152 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:53,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:53,152 INFO L85 PathProgramCache]: Analyzing trace with hash 900751119, now seen corresponding path program 7 times [2022-03-01 17:27:53,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:53,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392822600] [2022-03-01 17:27:53,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:53,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:53,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:53,383 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:53,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392822600] [2022-03-01 17:27:53,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392822600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:53,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836695649] [2022-03-01 17:27:53,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:27:53,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:53,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:53,388 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:53,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 17:27:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:53,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:27:53,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:53,523 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:53,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-03-01 17:27:53,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:53,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:27:53,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-01 17:27:53,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:53,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:54,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:54,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 62 [2022-03-01 17:27:54,470 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:54,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 106 [2022-03-01 17:27:54,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:54,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 82 [2022-03-01 17:27:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:54,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836695649] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:54,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:54,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:27:54,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333534364] [2022-03-01 17:27:54,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:54,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:27:54,600 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:54,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:27:54,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:27:54,601 INFO L87 Difference]: Start difference. First operand 402 states and 1149 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:54,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:54,921 INFO L93 Difference]: Finished difference Result 539 states and 1524 transitions. [2022-03-01 17:27:54,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:27:54,921 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:27:54,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:54,924 INFO L225 Difference]: With dead ends: 539 [2022-03-01 17:27:54,924 INFO L226 Difference]: Without dead ends: 473 [2022-03-01 17:27:54,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:27:54,925 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:54,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 238 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 535 Invalid, 0 Unknown, 152 Unchecked, 0.3s Time] [2022-03-01 17:27:54,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-03-01 17:27:54,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 402. [2022-03-01 17:27:54,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 401 states have (on average 2.865336658354115) internal successors, (1149), 401 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:54,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 1149 transitions. [2022-03-01 17:27:54,934 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 1149 transitions. Word has length 24 [2022-03-01 17:27:54,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:54,935 INFO L470 AbstractCegarLoop]: Abstraction has 402 states and 1149 transitions. [2022-03-01 17:27:54,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:54,936 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 1149 transitions. [2022-03-01 17:27:54,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:27:54,937 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:54,937 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:54,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:55,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:55,153 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:55,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:55,153 INFO L85 PathProgramCache]: Analyzing trace with hash -2022472717, now seen corresponding path program 8 times [2022-03-01 17:27:55,153 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:55,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380287081] [2022-03-01 17:27:55,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:55,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:55,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:55,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:55,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380287081] [2022-03-01 17:27:55,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380287081] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:55,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597830257] [2022-03-01 17:27:55,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:27:55,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:55,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:55,368 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:55,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 17:27:55,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:27:55,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:55,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:27:55,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:55,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-03-01 17:27:55,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:27:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:55,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:56,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:56,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 57 [2022-03-01 17:27:56,231 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:56,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-03-01 17:27:56,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:56,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2022-03-01 17:27:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:56,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597830257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:56,290 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:56,290 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:27:56,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758189411] [2022-03-01 17:27:56,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:56,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:27:56,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:56,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:27:56,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:27:56,291 INFO L87 Difference]: Start difference. First operand 402 states and 1149 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:56,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:56,662 INFO L93 Difference]: Finished difference Result 512 states and 1474 transitions. [2022-03-01 17:27:56,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:27:56,663 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:27:56,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:56,665 INFO L225 Difference]: With dead ends: 512 [2022-03-01 17:27:56,665 INFO L226 Difference]: Without dead ends: 481 [2022-03-01 17:27:56,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:27:56,665 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 55 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 741 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:56,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 202 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 741 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:27:56,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2022-03-01 17:27:56,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 407. [2022-03-01 17:27:56,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 406 states have (on average 2.8645320197044337) internal successors, (1163), 406 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:56,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 1163 transitions. [2022-03-01 17:27:56,675 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 1163 transitions. Word has length 24 [2022-03-01 17:27:56,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:56,675 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 1163 transitions. [2022-03-01 17:27:56,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:56,676 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 1163 transitions. [2022-03-01 17:27:56,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:27:56,677 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:56,677 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:56,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:56,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-03-01 17:27:56,900 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:56,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:56,900 INFO L85 PathProgramCache]: Analyzing trace with hash -858539543, now seen corresponding path program 9 times [2022-03-01 17:27:56,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:56,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068860760] [2022-03-01 17:27:56,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:56,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:57,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:57,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:57,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068860760] [2022-03-01 17:27:57,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068860760] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:57,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266915892] [2022-03-01 17:27:57,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:27:57,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:57,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:57,146 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:57,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 17:27:57,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:27:57,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:57,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:27:57,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:57,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:57,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-03-01 17:27:57,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:57,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:27:57,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-01 17:27:57,587 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:57,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:58,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:58,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 57 [2022-03-01 17:27:58,405 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:58,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 78 [2022-03-01 17:27:58,413 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:58,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-03-01 17:27:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:58,489 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266915892] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:58,489 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:58,489 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:27:58,489 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894184752] [2022-03-01 17:27:58,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:58,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:27:58,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:58,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:27:58,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:27:58,491 INFO L87 Difference]: Start difference. First operand 407 states and 1163 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:59,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:59,115 INFO L93 Difference]: Finished difference Result 742 states and 2065 transitions. [2022-03-01 17:27:59,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:27:59,116 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:27:59,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:59,119 INFO L225 Difference]: With dead ends: 742 [2022-03-01 17:27:59,119 INFO L226 Difference]: Without dead ends: 666 [2022-03-01 17:27:59,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:27:59,119 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 95 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 784 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:59,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 226 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 784 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time] [2022-03-01 17:27:59,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-03-01 17:27:59,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 432. [2022-03-01 17:27:59,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.879350348027842) internal successors, (1241), 431 states have internal predecessors, (1241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:59,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1241 transitions. [2022-03-01 17:27:59,130 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1241 transitions. Word has length 24 [2022-03-01 17:27:59,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:59,131 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1241 transitions. [2022-03-01 17:27:59,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:59,131 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1241 transitions. [2022-03-01 17:27:59,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:27:59,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:59,132 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:59,154 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:59,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-01 17:27:59,355 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:27:59,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:59,355 INFO L85 PathProgramCache]: Analyzing trace with hash -2022981807, now seen corresponding path program 10 times [2022-03-01 17:27:59,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:59,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991722741] [2022-03-01 17:27:59,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:59,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:59,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:59,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991722741] [2022-03-01 17:27:59,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991722741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:59,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157218613] [2022-03-01 17:27:59,588 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:27:59,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:59,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:59,589 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:59,590 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 17:27:59,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:27:59,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:59,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:27:59,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:59,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:59,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-03-01 17:27:59,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:59,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:27:59,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-01 17:27:59,915 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:27:59,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:00,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:00,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-03-01 17:28:00,629 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:00,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-01 17:28:00,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:00,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-01 17:28:00,744 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:00,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157218613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:00,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:00,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:00,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421118098] [2022-03-01 17:28:00,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:00,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:00,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:00,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:00,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:00,746 INFO L87 Difference]: Start difference. First operand 432 states and 1241 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:01,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:01,362 INFO L93 Difference]: Finished difference Result 578 states and 1675 transitions. [2022-03-01 17:28:01,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:28:01,362 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:01,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:01,365 INFO L225 Difference]: With dead ends: 578 [2022-03-01 17:28:01,365 INFO L226 Difference]: Without dead ends: 543 [2022-03-01 17:28:01,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:28:01,365 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 61 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:01,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 237 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 739 Invalid, 0 Unknown, 10 Unchecked, 0.4s Time] [2022-03-01 17:28:01,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-03-01 17:28:01,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 432. [2022-03-01 17:28:01,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.874709976798144) internal successors, (1239), 431 states have internal predecessors, (1239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:01,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1239 transitions. [2022-03-01 17:28:01,375 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1239 transitions. Word has length 24 [2022-03-01 17:28:01,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:01,375 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 1239 transitions. [2022-03-01 17:28:01,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:01,375 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1239 transitions. [2022-03-01 17:28:01,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:01,377 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:01,377 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:01,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:01,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-01 17:28:01,595 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:01,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:01,596 INFO L85 PathProgramCache]: Analyzing trace with hash 617078035, now seen corresponding path program 11 times [2022-03-01 17:28:01,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:01,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769026639] [2022-03-01 17:28:01,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:01,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:01,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:01,792 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:01,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769026639] [2022-03-01 17:28:01,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769026639] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:01,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036312695] [2022-03-01 17:28:01,792 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:28:01,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:01,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:01,794 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:01,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 17:28:01,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:28:01,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:01,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:28:01,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:01,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:01,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:01,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-03-01 17:28:01,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:01,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2022-03-01 17:28:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:02,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:02,544 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:02,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 76 [2022-03-01 17:28:02,874 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:02,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-03-01 17:28:02,880 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:02,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-03-01 17:28:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:02,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036312695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:02,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:02,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:02,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895985946] [2022-03-01 17:28:02,962 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:02,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:02,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:02,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:02,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:02,963 INFO L87 Difference]: Start difference. First operand 432 states and 1239 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:03,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:03,657 INFO L93 Difference]: Finished difference Result 620 states and 1736 transitions. [2022-03-01 17:28:03,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:28:03,658 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:03,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:03,660 INFO L225 Difference]: With dead ends: 620 [2022-03-01 17:28:03,660 INFO L226 Difference]: Without dead ends: 512 [2022-03-01 17:28:03,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:28:03,660 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:03,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 250 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 777 Invalid, 0 Unknown, 112 Unchecked, 0.4s Time] [2022-03-01 17:28:03,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-03-01 17:28:03,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 435. [2022-03-01 17:28:03,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.877880184331797) internal successors, (1249), 434 states have internal predecessors, (1249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:03,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 1249 transitions. [2022-03-01 17:28:03,667 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 1249 transitions. Word has length 24 [2022-03-01 17:28:03,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:03,667 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 1249 transitions. [2022-03-01 17:28:03,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:03,667 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 1249 transitions. [2022-03-01 17:28:03,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:03,668 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:03,669 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:03,686 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-01 17:28:03,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-01 17:28:03,875 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:03,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:03,876 INFO L85 PathProgramCache]: Analyzing trace with hash 2003695823, now seen corresponding path program 12 times [2022-03-01 17:28:03,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:03,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881565982] [2022-03-01 17:28:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:03,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:04,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:04,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881565982] [2022-03-01 17:28:04,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881565982] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:04,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231322565] [2022-03-01 17:28:04,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:28:04,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:04,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:04,111 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:04,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 17:28:04,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:28:04,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:04,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:28:04,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:04,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:04,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:04,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:04,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:28:04,443 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:04,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:04,861 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:04,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 53 [2022-03-01 17:28:04,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:04,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-03-01 17:28:04,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:04,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2022-03-01 17:28:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:05,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231322565] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:05,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:05,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:05,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826568747] [2022-03-01 17:28:05,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:05,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:05,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:05,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:05,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:05,089 INFO L87 Difference]: Start difference. First operand 435 states and 1249 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:05,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:05,604 INFO L93 Difference]: Finished difference Result 810 states and 2291 transitions. [2022-03-01 17:28:05,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:28:05,605 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:05,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:05,608 INFO L225 Difference]: With dead ends: 810 [2022-03-01 17:28:05,608 INFO L226 Difference]: Without dead ends: 779 [2022-03-01 17:28:05,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=908, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:28:05,609 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 128 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 440 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:05,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 360 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 533 Invalid, 0 Unknown, 440 Unchecked, 0.3s Time] [2022-03-01 17:28:05,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-03-01 17:28:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 450. [2022-03-01 17:28:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.8730512249443207) internal successors, (1290), 449 states have internal predecessors, (1290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:05,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1290 transitions. [2022-03-01 17:28:05,620 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1290 transitions. Word has length 24 [2022-03-01 17:28:05,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:05,620 INFO L470 AbstractCegarLoop]: Abstraction has 450 states and 1290 transitions. [2022-03-01 17:28:05,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:05,621 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1290 transitions. [2022-03-01 17:28:05,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:05,622 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:05,622 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:05,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:05,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-01 17:28:05,847 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:05,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:05,848 INFO L85 PathProgramCache]: Analyzing trace with hash -98564395, now seen corresponding path program 13 times [2022-03-01 17:28:05,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:05,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163539093] [2022-03-01 17:28:05,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:05,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:05,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:06,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:06,100 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:06,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163539093] [2022-03-01 17:28:06,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163539093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:06,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958173710] [2022-03-01 17:28:06,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:28:06,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:06,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:06,102 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:06,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 17:28:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:06,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:28:06,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:06,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:06,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:28:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:06,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:07,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:07,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 51 [2022-03-01 17:28:07,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:07,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 73 [2022-03-01 17:28:07,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:07,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 57 [2022-03-01 17:28:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:07,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958173710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:07,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:07,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:28:07,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386095892] [2022-03-01 17:28:07,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:07,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:28:07,218 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:07,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:28:07,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:28:07,218 INFO L87 Difference]: Start difference. First operand 450 states and 1290 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:09,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:09,174 INFO L93 Difference]: Finished difference Result 1281 states and 3602 transitions. [2022-03-01 17:28:09,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:28:09,174 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:09,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:09,178 INFO L225 Difference]: With dead ends: 1281 [2022-03-01 17:28:09,178 INFO L226 Difference]: Without dead ends: 1136 [2022-03-01 17:28:09,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=340, Invalid=1730, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:28:09,179 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 178 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:09,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 405 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:28:09,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2022-03-01 17:28:09,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 522. [2022-03-01 17:28:09,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 2.90978886756238) internal successors, (1516), 521 states have internal predecessors, (1516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:09,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1516 transitions. [2022-03-01 17:28:09,197 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1516 transitions. Word has length 24 [2022-03-01 17:28:09,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:09,198 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1516 transitions. [2022-03-01 17:28:09,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:09,198 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1516 transitions. [2022-03-01 17:28:09,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:09,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:09,199 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:09,227 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:09,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-01 17:28:09,415 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:09,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:09,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1065368779, now seen corresponding path program 14 times [2022-03-01 17:28:09,416 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:09,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886993352] [2022-03-01 17:28:09,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:09,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:09,631 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:09,632 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:09,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886993352] [2022-03-01 17:28:09,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886993352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:09,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834215795] [2022-03-01 17:28:09,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:28:09,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:09,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:09,633 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:09,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 17:28:09,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:28:09,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:09,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:28:09,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:09,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:09,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:09,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:09,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:28:10,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:10,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:10,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:10,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 53 [2022-03-01 17:28:10,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:10,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 55 [2022-03-01 17:28:10,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:10,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 43 [2022-03-01 17:28:10,901 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:10,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834215795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:10,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:10,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:28:10,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092450140] [2022-03-01 17:28:10,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:10,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:28:10,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:10,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:28:10,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:28:10,903 INFO L87 Difference]: Start difference. First operand 522 states and 1516 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:12,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:12,043 INFO L93 Difference]: Finished difference Result 920 states and 2481 transitions. [2022-03-01 17:28:12,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:28:12,043 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:12,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:12,046 INFO L225 Difference]: With dead ends: 920 [2022-03-01 17:28:12,046 INFO L226 Difference]: Without dead ends: 809 [2022-03-01 17:28:12,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:28:12,047 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 193 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:12,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 358 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 712 Invalid, 0 Unknown, 248 Unchecked, 0.3s Time] [2022-03-01 17:28:12,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-03-01 17:28:12,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 528. [2022-03-01 17:28:12,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 2.901328273244782) internal successors, (1529), 527 states have internal predecessors, (1529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:12,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1529 transitions. [2022-03-01 17:28:12,059 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1529 transitions. Word has length 24 [2022-03-01 17:28:12,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:12,059 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1529 transitions. [2022-03-01 17:28:12,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:12,059 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1529 transitions. [2022-03-01 17:28:12,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:12,060 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:12,060 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:12,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:12,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:12,283 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:12,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:12,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1316129901, now seen corresponding path program 15 times [2022-03-01 17:28:12,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:12,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440431659] [2022-03-01 17:28:12,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:12,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:12,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:12,578 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:12,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440431659] [2022-03-01 17:28:12,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440431659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:12,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320111459] [2022-03-01 17:28:12,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:28:12,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:12,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:12,580 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:12,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 17:28:12,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:28:12,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:12,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:28:12,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:12,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:12,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:12,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:12,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:12,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-03-01 17:28:12,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:12,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:13,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:13,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:28:13,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:13,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-01 17:28:13,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:13,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-01 17:28:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:13,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320111459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:13,735 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:13,735 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:13,736 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721440956] [2022-03-01 17:28:13,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:13,736 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:13,736 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:13,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:13,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:13,736 INFO L87 Difference]: Start difference. First operand 528 states and 1529 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:13,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:13,961 INFO L93 Difference]: Finished difference Result 894 states and 2562 transitions. [2022-03-01 17:28:13,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:28:13,962 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:13,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:13,966 INFO L225 Difference]: With dead ends: 894 [2022-03-01 17:28:13,966 INFO L226 Difference]: Without dead ends: 887 [2022-03-01 17:28:13,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:28:13,967 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 117 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:13,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 293 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 288 Invalid, 0 Unknown, 312 Unchecked, 0.1s Time] [2022-03-01 17:28:13,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-03-01 17:28:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 539. [2022-03-01 17:28:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 2.899628252788104) internal successors, (1560), 538 states have internal predecessors, (1560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 1560 transitions. [2022-03-01 17:28:14,007 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 1560 transitions. Word has length 24 [2022-03-01 17:28:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:14,007 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 1560 transitions. [2022-03-01 17:28:14,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:14,007 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 1560 transitions. [2022-03-01 17:28:14,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:14,008 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:14,008 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:14,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-01 17:28:14,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:14,210 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:14,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:14,211 INFO L85 PathProgramCache]: Analyzing trace with hash -530808241, now seen corresponding path program 16 times [2022-03-01 17:28:14,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:14,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321916820] [2022-03-01 17:28:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:14,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:14,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:14,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321916820] [2022-03-01 17:28:14,504 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321916820] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:14,504 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597014170] [2022-03-01 17:28:14,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:28:14,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:14,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:14,505 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:14,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 17:28:14,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:28:14,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:14,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:28:14,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:14,614 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:14,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:14,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:14,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:14,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-01 17:28:14,911 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:14,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:15,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:15,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 51 [2022-03-01 17:28:15,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:15,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 78 [2022-03-01 17:28:15,515 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:15,515 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-03-01 17:28:15,595 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:15,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597014170] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:15,595 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:15,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:15,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57626949] [2022-03-01 17:28:15,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:15,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:15,596 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:15,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:15,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:15,597 INFO L87 Difference]: Start difference. First operand 539 states and 1560 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:16,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:16,196 INFO L93 Difference]: Finished difference Result 1256 states and 3443 transitions. [2022-03-01 17:28:16,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:28:16,197 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:16,201 INFO L225 Difference]: With dead ends: 1256 [2022-03-01 17:28:16,201 INFO L226 Difference]: Without dead ends: 1123 [2022-03-01 17:28:16,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:28:16,201 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 176 mSDsluCounter, 768 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:16,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 370 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 713 Invalid, 0 Unknown, 261 Unchecked, 0.4s Time] [2022-03-01 17:28:16,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-03-01 17:28:16,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 528. [2022-03-01 17:28:16,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 2.933586337760911) internal successors, (1546), 527 states have internal predecessors, (1546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:16,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 1546 transitions. [2022-03-01 17:28:16,217 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 1546 transitions. Word has length 24 [2022-03-01 17:28:16,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:16,217 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 1546 transitions. [2022-03-01 17:28:16,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:16,217 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 1546 transitions. [2022-03-01 17:28:16,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:16,219 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:16,219 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:16,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:16,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:16,439 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:16,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:16,440 INFO L85 PathProgramCache]: Analyzing trace with hash 61317007, now seen corresponding path program 17 times [2022-03-01 17:28:16,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:16,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499417912] [2022-03-01 17:28:16,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:16,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:16,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:16,677 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:16,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499417912] [2022-03-01 17:28:16,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499417912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:16,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259941016] [2022-03-01 17:28:16,678 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:28:16,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:16,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:16,679 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:16,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 17:28:16,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:28:16,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:16,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:28:16,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:16,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:16,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:16,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:16,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:28:16,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:28:17,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:17,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:17,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:17,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 53 [2022-03-01 17:28:17,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:17,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-03-01 17:28:17,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:17,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2022-03-01 17:28:17,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:17,636 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259941016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:17,636 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:17,636 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:17,636 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435606798] [2022-03-01 17:28:17,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:17,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:17,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:17,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:17,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:17,637 INFO L87 Difference]: Start difference. First operand 528 states and 1546 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:18,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:18,016 INFO L93 Difference]: Finished difference Result 835 states and 2396 transitions. [2022-03-01 17:28:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:28:18,017 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:18,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:18,019 INFO L225 Difference]: With dead ends: 835 [2022-03-01 17:28:18,019 INFO L226 Difference]: Without dead ends: 752 [2022-03-01 17:28:18,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:28:18,020 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 139 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 499 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:18,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 283 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 440 Invalid, 0 Unknown, 499 Unchecked, 0.2s Time] [2022-03-01 17:28:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-03-01 17:28:18,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 540. [2022-03-01 17:28:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.929499072356215) internal successors, (1579), 539 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1579 transitions. [2022-03-01 17:28:18,042 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1579 transitions. Word has length 24 [2022-03-01 17:28:18,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:18,042 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 1579 transitions. [2022-03-01 17:28:18,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:18,043 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1579 transitions. [2022-03-01 17:28:18,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:18,044 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:18,044 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:18,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:18,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:18,251 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:18,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:18,252 INFO L85 PathProgramCache]: Analyzing trace with hash 2140610835, now seen corresponding path program 18 times [2022-03-01 17:28:18,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:18,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626404519] [2022-03-01 17:28:18,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:18,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:18,404 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:18,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:18,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626404519] [2022-03-01 17:28:18,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626404519] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:18,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594487831] [2022-03-01 17:28:18,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:28:18,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:18,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:18,406 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:18,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 17:28:18,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:28:18,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:18,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:28:18,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:18,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:18,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:28:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:18,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:19,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:19,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-01 17:28:19,429 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:19,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 72 [2022-03-01 17:28:19,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:19,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2022-03-01 17:28:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:19,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594487831] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:19,505 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:19,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:19,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526846141] [2022-03-01 17:28:19,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:19,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:19,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:19,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:19,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:19,507 INFO L87 Difference]: Start difference. First operand 540 states and 1579 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:22,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:22,506 INFO L93 Difference]: Finished difference Result 1981 states and 5324 transitions. [2022-03-01 17:28:22,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:28:22,506 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:22,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:22,514 INFO L225 Difference]: With dead ends: 1981 [2022-03-01 17:28:22,514 INFO L226 Difference]: Without dead ends: 1718 [2022-03-01 17:28:22,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=446, Invalid=1906, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:28:22,515 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 304 mSDsluCounter, 776 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:22,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 429 Invalid, 1276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:28:22,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2022-03-01 17:28:22,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 569. [2022-03-01 17:28:22,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 3.007042253521127) internal successors, (1708), 568 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:22,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1708 transitions. [2022-03-01 17:28:22,535 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1708 transitions. Word has length 24 [2022-03-01 17:28:22,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:22,535 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 1708 transitions. [2022-03-01 17:28:22,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:22,536 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1708 transitions. [2022-03-01 17:28:22,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:22,537 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:22,537 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:22,560 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:22,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:22,759 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:22,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:22,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1577784015, now seen corresponding path program 19 times [2022-03-01 17:28:22,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:22,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002627807] [2022-03-01 17:28:22,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:22,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:23,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:23,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:23,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002627807] [2022-03-01 17:28:23,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002627807] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:23,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445519635] [2022-03-01 17:28:23,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:28:23,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:23,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:23,012 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:23,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 17:28:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:23,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:28:23,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:23,122 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:23,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:28:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:23,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:23,974 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:23,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:28:24,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:24,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-03-01 17:28:24,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:24,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-03-01 17:28:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:24,235 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445519635] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:24,235 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:24,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:24,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134689819] [2022-03-01 17:28:24,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:24,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:24,236 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:24,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:24,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:24,236 INFO L87 Difference]: Start difference. First operand 569 states and 1708 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:25,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:25,199 INFO L93 Difference]: Finished difference Result 1074 states and 3188 transitions. [2022-03-01 17:28:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:28:25,200 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:25,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:25,203 INFO L225 Difference]: With dead ends: 1074 [2022-03-01 17:28:25,203 INFO L226 Difference]: Without dead ends: 973 [2022-03-01 17:28:25,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:28:25,207 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 153 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:25,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 289 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:28:25,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-03-01 17:28:25,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 570. [2022-03-01 17:28:25,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 3.0105448154657295) internal successors, (1713), 569 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:25,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1713 transitions. [2022-03-01 17:28:25,220 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1713 transitions. Word has length 24 [2022-03-01 17:28:25,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:25,220 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 1713 transitions. [2022-03-01 17:28:25,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:25,221 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1713 transitions. [2022-03-01 17:28:25,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:25,222 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:25,222 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:25,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:25,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:25,439 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:25,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:25,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1952639283, now seen corresponding path program 20 times [2022-03-01 17:28:25,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:25,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080455189] [2022-03-01 17:28:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:25,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:25,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:25,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:25,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:25,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080455189] [2022-03-01 17:28:25,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080455189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:25,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231862590] [2022-03-01 17:28:25,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:28:25,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:25,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:25,669 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:25,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 17:28:25,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:28:25,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:25,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:28:25,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:25,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:26,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:26,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:28:26,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:26,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:28:26,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:26,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:26,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:26,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 72 [2022-03-01 17:28:26,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:26,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-03-01 17:28:26,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:26,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2022-03-01 17:28:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:26,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231862590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:26,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:26,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:28:26,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136942108] [2022-03-01 17:28:26,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:26,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:28:26,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:26,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:28:26,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:28:26,779 INFO L87 Difference]: Start difference. First operand 570 states and 1713 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:27,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:27,245 INFO L93 Difference]: Finished difference Result 705 states and 2085 transitions. [2022-03-01 17:28:27,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:28:27,245 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:27,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:27,247 INFO L225 Difference]: With dead ends: 705 [2022-03-01 17:28:27,247 INFO L226 Difference]: Without dead ends: 646 [2022-03-01 17:28:27,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:28:27,248 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:27,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 260 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 668 Invalid, 0 Unknown, 91 Unchecked, 0.3s Time] [2022-03-01 17:28:27,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2022-03-01 17:28:27,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 571. [2022-03-01 17:28:27,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 3.012280701754386) internal successors, (1717), 570 states have internal predecessors, (1717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1717 transitions. [2022-03-01 17:28:27,259 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1717 transitions. Word has length 24 [2022-03-01 17:28:27,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:27,259 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 1717 transitions. [2022-03-01 17:28:27,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:27,260 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1717 transitions. [2022-03-01 17:28:27,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:27,261 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:27,261 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:27,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:27,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-01 17:28:27,471 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:27,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:27,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1178394839, now seen corresponding path program 21 times [2022-03-01 17:28:27,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:27,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574012708] [2022-03-01 17:28:27,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:27,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:27,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:27,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:27,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574012708] [2022-03-01 17:28:27,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574012708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:27,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856008928] [2022-03-01 17:28:27,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:28:27,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:27,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:27,720 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:27,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 17:28:27,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:28:27,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:27,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:28:27,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:27,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:27,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:28:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:28,080 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:28,654 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:28,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 74 [2022-03-01 17:28:28,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:28,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 73 [2022-03-01 17:28:28,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:28,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 57 [2022-03-01 17:28:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:28,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856008928] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:28,898 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:28,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:28,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946221193] [2022-03-01 17:28:28,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:28,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:28,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:28,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:28,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:28,900 INFO L87 Difference]: Start difference. First operand 571 states and 1717 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:29,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:29,913 INFO L93 Difference]: Finished difference Result 1213 states and 3434 transitions. [2022-03-01 17:28:29,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:28:29,914 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:29,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:29,916 INFO L225 Difference]: With dead ends: 1213 [2022-03-01 17:28:29,916 INFO L226 Difference]: Without dead ends: 1075 [2022-03-01 17:28:29,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:28:29,917 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 140 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:29,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 330 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:28:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-03-01 17:28:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 576. [2022-03-01 17:28:29,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 575 states have (on average 3.022608695652174) internal successors, (1738), 575 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:29,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 1738 transitions. [2022-03-01 17:28:29,930 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 1738 transitions. Word has length 24 [2022-03-01 17:28:29,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:29,931 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 1738 transitions. [2022-03-01 17:28:29,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:29,931 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 1738 transitions. [2022-03-01 17:28:29,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:29,932 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:29,932 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:29,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:30,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-01 17:28:30,136 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:30,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:30,137 INFO L85 PathProgramCache]: Analyzing trace with hash -2033777169, now seen corresponding path program 22 times [2022-03-01 17:28:30,137 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:30,137 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140652703] [2022-03-01 17:28:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:30,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:30,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:30,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:30,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140652703] [2022-03-01 17:28:30,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140652703] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:30,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786922701] [2022-03-01 17:28:30,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:28:30,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:30,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:30,372 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:30,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 17:28:30,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:28:30,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:30,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:28:30,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:30,546 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:30,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:30,971 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:30,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:30,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:30,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-03-01 17:28:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:31,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:31,568 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:31,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-03-01 17:28:31,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:31,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 78 [2022-03-01 17:28:31,796 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:31,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-03-01 17:28:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:31,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786922701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:31,875 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:31,875 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:31,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462405069] [2022-03-01 17:28:31,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:31,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:31,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:31,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:31,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:31,876 INFO L87 Difference]: Start difference. First operand 576 states and 1738 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:32,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:32,198 INFO L93 Difference]: Finished difference Result 755 states and 2203 transitions. [2022-03-01 17:28:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:28:32,199 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:32,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:32,200 INFO L225 Difference]: With dead ends: 755 [2022-03-01 17:28:32,200 INFO L226 Difference]: Without dead ends: 657 [2022-03-01 17:28:32,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:28:32,201 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:32,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 198 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 478 Invalid, 0 Unknown, 167 Unchecked, 0.2s Time] [2022-03-01 17:28:32,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-03-01 17:28:32,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 583. [2022-03-01 17:28:32,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.0326460481099655) internal successors, (1765), 582 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:32,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1765 transitions. [2022-03-01 17:28:32,210 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1765 transitions. Word has length 24 [2022-03-01 17:28:32,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:32,210 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 1765 transitions. [2022-03-01 17:28:32,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:32,210 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1765 transitions. [2022-03-01 17:28:32,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:32,211 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:32,211 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:32,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:32,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-01 17:28:32,412 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:32,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:32,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2041958899, now seen corresponding path program 23 times [2022-03-01 17:28:32,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:32,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936442480] [2022-03-01 17:28:32,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:32,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:32,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:32,675 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:32,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936442480] [2022-03-01 17:28:32,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936442480] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:32,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094429840] [2022-03-01 17:28:32,675 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:28:32,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:32,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:32,676 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:32,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 17:28:32,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:28:32,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:32,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:28:32,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:32,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:33,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:33,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:28:33,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:33,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:28:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:33,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:33,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:33,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-01 17:28:34,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:34,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 111 [2022-03-01 17:28:34,236 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:34,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 87 [2022-03-01 17:28:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:34,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094429840] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:34,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:34,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:28:34,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412824707] [2022-03-01 17:28:34,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:34,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:28:34,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:34,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:28:34,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:28:34,301 INFO L87 Difference]: Start difference. First operand 583 states and 1765 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:34,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:34,550 INFO L93 Difference]: Finished difference Result 694 states and 2079 transitions. [2022-03-01 17:28:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:28:34,551 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:34,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:34,552 INFO L225 Difference]: With dead ends: 694 [2022-03-01 17:28:34,552 INFO L226 Difference]: Without dead ends: 663 [2022-03-01 17:28:34,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:28:34,553 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:34,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 189 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 484 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2022-03-01 17:28:34,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-03-01 17:28:34,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 577. [2022-03-01 17:28:34,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 577 states, 576 states have (on average 3.0225694444444446) internal successors, (1741), 576 states have internal predecessors, (1741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:34,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 577 states to 577 states and 1741 transitions. [2022-03-01 17:28:34,564 INFO L78 Accepts]: Start accepts. Automaton has 577 states and 1741 transitions. Word has length 24 [2022-03-01 17:28:34,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:34,564 INFO L470 AbstractCegarLoop]: Abstraction has 577 states and 1741 transitions. [2022-03-01 17:28:34,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:34,564 INFO L276 IsEmpty]: Start isEmpty. Operand 577 states and 1741 transitions. [2022-03-01 17:28:34,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:34,566 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:34,566 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:34,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:34,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:34,779 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:34,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:34,780 INFO L85 PathProgramCache]: Analyzing trace with hash -894721755, now seen corresponding path program 24 times [2022-03-01 17:28:34,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:34,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581197995] [2022-03-01 17:28:34,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:34,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:35,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:35,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581197995] [2022-03-01 17:28:35,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581197995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:35,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4032490] [2022-03-01 17:28:35,001 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:28:35,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:35,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:35,004 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:35,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 17:28:35,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:28:35,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:35,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:28:35,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:35,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-03-01 17:28:35,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2022-03-01 17:28:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:35,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:36,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:36,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-03-01 17:28:36,180 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:36,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2022-03-01 17:28:36,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:36,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 39 [2022-03-01 17:28:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:36,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4032490] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:36,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:36,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:28:36,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542302038] [2022-03-01 17:28:36,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:36,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:28:36,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:36,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:28:36,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:28:36,247 INFO L87 Difference]: Start difference. First operand 577 states and 1741 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:36,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:36,831 INFO L93 Difference]: Finished difference Result 934 states and 2679 transitions. [2022-03-01 17:28:36,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:28:36,832 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:36,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:36,833 INFO L225 Difference]: With dead ends: 934 [2022-03-01 17:28:36,834 INFO L226 Difference]: Without dead ends: 841 [2022-03-01 17:28:36,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:28:36,834 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 81 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 953 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:36,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 289 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 953 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:28:36,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-03-01 17:28:36,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 584. [2022-03-01 17:28:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 583 states have (on average 3.039451114922813) internal successors, (1772), 583 states have internal predecessors, (1772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:36,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 1772 transitions. [2022-03-01 17:28:36,846 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 1772 transitions. Word has length 24 [2022-03-01 17:28:36,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:36,846 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 1772 transitions. [2022-03-01 17:28:36,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:36,847 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 1772 transitions. [2022-03-01 17:28:36,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:36,848 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:36,848 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:36,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:37,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-01 17:28:37,063 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:37,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1467646519, now seen corresponding path program 25 times [2022-03-01 17:28:37,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:37,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848209112] [2022-03-01 17:28:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:37,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:37,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:37,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:37,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848209112] [2022-03-01 17:28:37,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848209112] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:37,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273321006] [2022-03-01 17:28:37,382 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:28:37,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:37,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:37,383 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:37,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 17:28:37,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:37,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:28:37,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:37,538 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:37,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:37,664 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:37,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:28:37,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:37,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:28:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:37,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:38,439 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:38,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2022-03-01 17:28:38,605 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:38,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 75 [2022-03-01 17:28:38,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:38,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 59 [2022-03-01 17:28:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:38,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273321006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:38,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:38,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:38,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057641240] [2022-03-01 17:28:38,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:38,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:38,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:38,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:38,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:38,689 INFO L87 Difference]: Start difference. First operand 584 states and 1772 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:42,006 INFO L93 Difference]: Finished difference Result 1856 states and 4958 transitions. [2022-03-01 17:28:42,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:28:42,006 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:42,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:42,009 INFO L225 Difference]: With dead ends: 1856 [2022-03-01 17:28:42,009 INFO L226 Difference]: Without dead ends: 1618 [2022-03-01 17:28:42,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=464, Invalid=2188, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 17:28:42,010 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 288 mSDsluCounter, 1007 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 604 SdHoareTripleChecker+Invalid, 1511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:42,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 604 Invalid, 1511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1303 Invalid, 0 Unknown, 136 Unchecked, 0.7s Time] [2022-03-01 17:28:42,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1618 states. [2022-03-01 17:28:42,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1618 to 595. [2022-03-01 17:28:42,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 3.0622895622895623) internal successors, (1819), 594 states have internal predecessors, (1819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1819 transitions. [2022-03-01 17:28:42,027 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1819 transitions. Word has length 24 [2022-03-01 17:28:42,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:42,027 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1819 transitions. [2022-03-01 17:28:42,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1819 transitions. [2022-03-01 17:28:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:42,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:42,028 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:42,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:42,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-01 17:28:42,235 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:42,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:42,235 INFO L85 PathProgramCache]: Analyzing trace with hash -165436977, now seen corresponding path program 26 times [2022-03-01 17:28:42,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:42,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417408190] [2022-03-01 17:28:42,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:42,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:42,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:42,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:42,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417408190] [2022-03-01 17:28:42,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417408190] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:42,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835492506] [2022-03-01 17:28:42,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:28:42,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:42,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:42,518 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:42,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 17:28:42,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:28:42,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:42,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:28:42,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:42,637 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:42,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:28:42,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:42,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-01 17:28:42,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:42,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:28:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:42,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:43,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:43,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 121 [2022-03-01 17:28:43,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:43,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2022-03-01 17:28:43,767 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:43,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-03-01 17:28:43,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:43,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835492506] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:43,851 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:43,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:43,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143629816] [2022-03-01 17:28:43,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:43,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:43,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:43,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:43,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:43,853 INFO L87 Difference]: Start difference. First operand 595 states and 1819 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:45,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:45,019 INFO L93 Difference]: Finished difference Result 850 states and 2466 transitions. [2022-03-01 17:28:45,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:28:45,020 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:45,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:45,022 INFO L225 Difference]: With dead ends: 850 [2022-03-01 17:28:45,022 INFO L226 Difference]: Without dead ends: 757 [2022-03-01 17:28:45,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=172, Invalid=950, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:28:45,023 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 199 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:45,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 176 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 477 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2022-03-01 17:28:45,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-03-01 17:28:45,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 602. [2022-03-01 17:28:45,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 3.0782029950083194) internal successors, (1850), 601 states have internal predecessors, (1850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1850 transitions. [2022-03-01 17:28:45,033 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1850 transitions. Word has length 24 [2022-03-01 17:28:45,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:45,033 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1850 transitions. [2022-03-01 17:28:45,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:45,033 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1850 transitions. [2022-03-01 17:28:45,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:45,034 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:45,034 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:45,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:45,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-01 17:28:45,235 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:45,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:45,235 INFO L85 PathProgramCache]: Analyzing trace with hash -738361741, now seen corresponding path program 27 times [2022-03-01 17:28:45,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:45,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056314267] [2022-03-01 17:28:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:45,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:45,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:45,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:45,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056314267] [2022-03-01 17:28:45,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056314267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:45,557 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566245397] [2022-03-01 17:28:45,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:28:45,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:45,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:45,560 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:45,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 17:28:45,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:28:45,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:45,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:28:45,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:45,759 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:45,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:28:45,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:45,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-01 17:28:45,823 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:45,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:28:45,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:45,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:46,488 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:46,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-01 17:28:46,769 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:46,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-01 17:28:46,775 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:46,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-01 17:28:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:46,832 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566245397] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:46,832 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:46,832 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:46,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559613897] [2022-03-01 17:28:46,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:46,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:46,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:46,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:46,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:46,833 INFO L87 Difference]: Start difference. First operand 602 states and 1850 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:47,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:47,116 INFO L93 Difference]: Finished difference Result 747 states and 2272 transitions. [2022-03-01 17:28:47,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:28:47,116 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:47,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:47,118 INFO L225 Difference]: With dead ends: 747 [2022-03-01 17:28:47,118 INFO L226 Difference]: Without dead ends: 716 [2022-03-01 17:28:47,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:28:47,119 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:47,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 205 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 442 Invalid, 0 Unknown, 143 Unchecked, 0.2s Time] [2022-03-01 17:28:47,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-03-01 17:28:47,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 608. [2022-03-01 17:28:47,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 607 states have (on average 3.084019769357496) internal successors, (1872), 607 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 1872 transitions. [2022-03-01 17:28:47,131 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 1872 transitions. Word has length 24 [2022-03-01 17:28:47,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:47,131 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 1872 transitions. [2022-03-01 17:28:47,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:47,131 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 1872 transitions. [2022-03-01 17:28:47,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:47,133 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:47,133 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:47,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:47,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:47,355 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:47,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:47,356 INFO L85 PathProgramCache]: Analyzing trace with hash 998137971, now seen corresponding path program 28 times [2022-03-01 17:28:47,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:47,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718460618] [2022-03-01 17:28:47,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:47,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:47,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:47,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:47,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718460618] [2022-03-01 17:28:47,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718460618] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:47,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459705234] [2022-03-01 17:28:47,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:28:47,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:47,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:47,657 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:47,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 17:28:47,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:28:47,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:47,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:28:47,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:47,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:47,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:28:47,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:47,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:47,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:47,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:28:48,040 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:48,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:48,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:48,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 97 [2022-03-01 17:28:48,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:48,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-01 17:28:48,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:48,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-01 17:28:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:48,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459705234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:48,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:48,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:48,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466995502] [2022-03-01 17:28:48,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:48,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:48,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:48,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:48,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:48,981 INFO L87 Difference]: Start difference. First operand 608 states and 1872 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:49,653 INFO L93 Difference]: Finished difference Result 805 states and 2374 transitions. [2022-03-01 17:28:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:28:49,654 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:49,655 INFO L225 Difference]: With dead ends: 805 [2022-03-01 17:28:49,655 INFO L226 Difference]: Without dead ends: 731 [2022-03-01 17:28:49,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:28:49,656 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 104 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:49,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 196 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 452 Invalid, 0 Unknown, 139 Unchecked, 0.2s Time] [2022-03-01 17:28:49,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-03-01 17:28:49,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 622. [2022-03-01 17:28:49,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 3.074074074074074) internal successors, (1909), 621 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:49,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1909 transitions. [2022-03-01 17:28:49,669 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1909 transitions. Word has length 24 [2022-03-01 17:28:49,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:49,669 INFO L470 AbstractCegarLoop]: Abstraction has 622 states and 1909 transitions. [2022-03-01 17:28:49,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1909 transitions. [2022-03-01 17:28:49,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:49,670 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:49,670 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:49,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:49,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:49,885 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:49,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:49,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1214886259, now seen corresponding path program 29 times [2022-03-01 17:28:49,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:49,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965045693] [2022-03-01 17:28:49,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:49,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:49,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:50,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:28:50,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:50,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965045693] [2022-03-01 17:28:50,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965045693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:50,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165115944] [2022-03-01 17:28:50,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:28:50,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:50,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:50,252 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:50,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 17:28:50,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:28:50,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:50,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:28:50,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:50,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:50,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:28:50,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:50,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-01 17:28:50,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:50,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-03-01 17:28:50,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:28:50,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:51,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:51,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 119 [2022-03-01 17:28:51,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:51,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2022-03-01 17:28:51,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:51,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 36 [2022-03-01 17:28:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:28:51,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165115944] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:51,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:51,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:51,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468975046] [2022-03-01 17:28:51,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:51,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:51,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:51,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:51,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:51,388 INFO L87 Difference]: Start difference. First operand 622 states and 1909 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:51,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:51,812 INFO L93 Difference]: Finished difference Result 703 states and 2151 transitions. [2022-03-01 17:28:51,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:28:51,812 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:51,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:51,814 INFO L225 Difference]: With dead ends: 703 [2022-03-01 17:28:51,814 INFO L226 Difference]: Without dead ends: 684 [2022-03-01 17:28:51,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:28:51,815 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:51,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 198 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 583 Invalid, 0 Unknown, 23 Unchecked, 0.3s Time] [2022-03-01 17:28:51,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-03-01 17:28:51,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 606. [2022-03-01 17:28:51,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 3.0859504132231406) internal successors, (1867), 605 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:51,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1867 transitions. [2022-03-01 17:28:51,827 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1867 transitions. Word has length 24 [2022-03-01 17:28:51,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:51,827 INFO L470 AbstractCegarLoop]: Abstraction has 606 states and 1867 transitions. [2022-03-01 17:28:51,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:51,827 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1867 transitions. [2022-03-01 17:28:51,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:51,828 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:51,828 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:51,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:52,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:52,051 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:52,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:52,052 INFO L85 PathProgramCache]: Analyzing trace with hash 630291485, now seen corresponding path program 30 times [2022-03-01 17:28:52,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:52,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607923923] [2022-03-01 17:28:52,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:52,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:52,242 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:52,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607923923] [2022-03-01 17:28:52,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607923923] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:52,243 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024935946] [2022-03-01 17:28:52,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:28:52,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:52,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:52,247 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:52,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 17:28:52,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:28:52,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:52,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:28:52,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:52,325 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:52,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:52,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:52,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:28:52,650 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:52,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:53,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:53,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-03-01 17:28:53,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:53,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:28:53,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:53,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:28:53,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:53,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024935946] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:53,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:53,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:53,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044559055] [2022-03-01 17:28:53,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:53,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:53,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:53,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:53,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:53,174 INFO L87 Difference]: Start difference. First operand 606 states and 1867 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:53,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:53,735 INFO L93 Difference]: Finished difference Result 1200 states and 3549 transitions. [2022-03-01 17:28:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:28:53,736 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:53,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:53,738 INFO L225 Difference]: With dead ends: 1200 [2022-03-01 17:28:53,738 INFO L226 Difference]: Without dead ends: 1124 [2022-03-01 17:28:53,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:28:53,739 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 169 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:53,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 340 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 664 Invalid, 0 Unknown, 348 Unchecked, 0.3s Time] [2022-03-01 17:28:53,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2022-03-01 17:28:53,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 670. [2022-03-01 17:28:53,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 669 states have (on average 3.0418535127055306) internal successors, (2035), 669 states have internal predecessors, (2035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:53,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 2035 transitions. [2022-03-01 17:28:53,751 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 2035 transitions. Word has length 24 [2022-03-01 17:28:53,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:53,751 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 2035 transitions. [2022-03-01 17:28:53,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:53,751 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 2035 transitions. [2022-03-01 17:28:53,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:53,753 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:53,753 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:53,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:53,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-01 17:28:53,979 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:53,980 INFO L85 PathProgramCache]: Analyzing trace with hash -1205608895, now seen corresponding path program 31 times [2022-03-01 17:28:53,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:53,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83894440] [2022-03-01 17:28:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:53,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:54,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:54,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:54,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83894440] [2022-03-01 17:28:54,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83894440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:54,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221637164] [2022-03-01 17:28:54,154 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:28:54,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:54,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:54,155 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:54,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 17:28:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:54,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:28:54,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:54,234 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:54,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:54,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:54,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:54,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:28:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:54,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:55,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:55,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-03-01 17:28:55,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:55,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:28:55,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:55,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:28:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:55,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221637164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:55,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:55,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:55,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080896444] [2022-03-01 17:28:55,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:55,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:55,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:55,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:55,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:55,209 INFO L87 Difference]: Start difference. First operand 670 states and 2035 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:56,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:56,243 INFO L93 Difference]: Finished difference Result 1119 states and 3292 transitions. [2022-03-01 17:28:56,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:28:56,244 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:56,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:56,247 INFO L225 Difference]: With dead ends: 1119 [2022-03-01 17:28:56,247 INFO L226 Difference]: Without dead ends: 1059 [2022-03-01 17:28:56,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=246, Invalid=1236, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:28:56,248 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 142 mSDsluCounter, 759 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:56,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 406 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 838 Invalid, 0 Unknown, 246 Unchecked, 0.4s Time] [2022-03-01 17:28:56,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2022-03-01 17:28:56,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 626. [2022-03-01 17:28:56,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 3.0896) internal successors, (1931), 625 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1931 transitions. [2022-03-01 17:28:56,262 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1931 transitions. Word has length 24 [2022-03-01 17:28:56,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:56,263 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 1931 transitions. [2022-03-01 17:28:56,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:56,263 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1931 transitions. [2022-03-01 17:28:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:56,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:56,264 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:56,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:56,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-01 17:28:56,487 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:56,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:56,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1471968733, now seen corresponding path program 32 times [2022-03-01 17:28:56,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:56,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626968038] [2022-03-01 17:28:56,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:56,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:56,689 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:56,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626968038] [2022-03-01 17:28:56,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626968038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:56,689 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526702246] [2022-03-01 17:28:56,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:28:56,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:56,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:56,691 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:56,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 17:28:56,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:28:56,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:56,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:28:56,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:56,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:56,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:57,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:57,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:28:57,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:57,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:57,581 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:57,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-03-01 17:28:57,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:57,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:28:57,648 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:57,648 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:28:57,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:57,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526702246] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:57,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:57,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:28:57,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339040119] [2022-03-01 17:28:57,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:57,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:28:57,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:57,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:28:57,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:57,668 INFO L87 Difference]: Start difference. First operand 626 states and 1931 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:58,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:58,165 INFO L93 Difference]: Finished difference Result 914 states and 2800 transitions. [2022-03-01 17:28:58,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:28:58,166 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:28:58,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:58,167 INFO L225 Difference]: With dead ends: 914 [2022-03-01 17:28:58,168 INFO L226 Difference]: Without dead ends: 883 [2022-03-01 17:28:58,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:28:58,168 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 101 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:58,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 377 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 685 Invalid, 0 Unknown, 248 Unchecked, 0.3s Time] [2022-03-01 17:28:58,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-03-01 17:28:58,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 626. [2022-03-01 17:28:58,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 3.0896) internal successors, (1931), 625 states have internal predecessors, (1931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:58,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1931 transitions. [2022-03-01 17:28:58,178 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1931 transitions. Word has length 24 [2022-03-01 17:28:58,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:58,179 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 1931 transitions. [2022-03-01 17:28:58,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:58,179 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1931 transitions. [2022-03-01 17:28:58,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:28:58,180 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:58,180 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:58,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:58,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:58,389 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:28:58,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:58,390 INFO L85 PathProgramCache]: Analyzing trace with hash -308035559, now seen corresponding path program 33 times [2022-03-01 17:28:58,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:58,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090081620] [2022-03-01 17:28:58,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:58,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:58,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:58,573 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:58,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090081620] [2022-03-01 17:28:58,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090081620] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:58,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256208676] [2022-03-01 17:28:58,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:28:58,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:58,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:58,574 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:58,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 17:28:58,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:28:58,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:58,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:28:58,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:58,655 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:58,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:28:58,898 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:58,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2022-03-01 17:28:58,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:28:58,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:28:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:59,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:59,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:59,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-01 17:28:59,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:59,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:28:59,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:59,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:28:59,821 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:28:59,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256208676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:59,821 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:59,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:28:59,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769333294] [2022-03-01 17:28:59,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:59,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:28:59,822 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:59,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:28:59,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:28:59,822 INFO L87 Difference]: Start difference. First operand 626 states and 1931 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:00,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:00,471 INFO L93 Difference]: Finished difference Result 1090 states and 3202 transitions. [2022-03-01 17:29:00,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:29:00,471 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:00,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:00,474 INFO L225 Difference]: With dead ends: 1090 [2022-03-01 17:29:00,474 INFO L226 Difference]: Without dead ends: 985 [2022-03-01 17:29:00,475 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:29:00,475 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 125 mSDsluCounter, 895 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:00,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 492 Invalid, 1402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1103 Invalid, 0 Unknown, 272 Unchecked, 0.5s Time] [2022-03-01 17:29:00,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-03-01 17:29:00,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 626. [2022-03-01 17:29:00,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 626 states, 625 states have (on average 3.096) internal successors, (1935), 625 states have internal predecessors, (1935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:00,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 1935 transitions. [2022-03-01 17:29:00,489 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 1935 transitions. Word has length 24 [2022-03-01 17:29:00,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:00,489 INFO L470 AbstractCegarLoop]: Abstraction has 626 states and 1935 transitions. [2022-03-01 17:29:00,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:00,490 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 1935 transitions. [2022-03-01 17:29:00,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:00,491 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:00,491 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:00,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:00,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-01 17:29:00,714 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:00,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:00,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1605433057, now seen corresponding path program 34 times [2022-03-01 17:29:00,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:00,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024858873] [2022-03-01 17:29:00,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:00,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:00,957 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:00,958 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:00,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024858873] [2022-03-01 17:29:00,958 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024858873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:00,958 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833682316] [2022-03-01 17:29:00,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:29:00,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:00,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:00,959 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:00,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 17:29:00,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:29:00,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:00,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:29:00,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:01,049 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:01,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:29:01,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:01,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:01,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:29:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:01,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:01,791 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:01,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-03-01 17:29:01,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:01,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:29:01,892 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:01,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:29:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:01,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833682316] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:01,916 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:01,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:29:01,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212138411] [2022-03-01 17:29:01,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:01,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:01,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:01,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:01,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:01,918 INFO L87 Difference]: Start difference. First operand 626 states and 1935 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:02,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:02,443 INFO L93 Difference]: Finished difference Result 1104 states and 3312 transitions. [2022-03-01 17:29:02,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:29:02,443 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:02,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:02,446 INFO L225 Difference]: With dead ends: 1104 [2022-03-01 17:29:02,446 INFO L226 Difference]: Without dead ends: 1001 [2022-03-01 17:29:02,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:29:02,447 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 108 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 767 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:02,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 329 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 767 Invalid, 0 Unknown, 87 Unchecked, 0.3s Time] [2022-03-01 17:29:02,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1001 states. [2022-03-01 17:29:02,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1001 to 631. [2022-03-01 17:29:02,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 630 states have (on average 3.1031746031746033) internal successors, (1955), 630 states have internal predecessors, (1955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:02,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1955 transitions. [2022-03-01 17:29:02,459 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1955 transitions. Word has length 24 [2022-03-01 17:29:02,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:02,459 INFO L470 AbstractCegarLoop]: Abstraction has 631 states and 1955 transitions. [2022-03-01 17:29:02,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:02,460 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1955 transitions. [2022-03-01 17:29:02,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:02,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:02,461 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:02,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:02,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-01 17:29:02,675 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:02,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1312087331, now seen corresponding path program 35 times [2022-03-01 17:29:02,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:02,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808200332] [2022-03-01 17:29:02,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:02,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:02,885 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:02,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808200332] [2022-03-01 17:29:02,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808200332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:02,885 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543737441] [2022-03-01 17:29:02,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:29:02,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:02,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:02,887 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:02,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 17:29:02,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:29:02,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:02,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:29:02,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:02,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:02,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:29:03,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:03,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:29:03,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-01 17:29:03,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:03,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:03,757 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:03,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-03-01 17:29:03,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:03,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:29:03,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:03,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:29:03,857 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:03,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543737441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:03,857 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:03,858 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:29:03,858 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320087238] [2022-03-01 17:29:03,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:03,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:03,858 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:03,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:03,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:03,859 INFO L87 Difference]: Start difference. First operand 631 states and 1955 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:04,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:04,527 INFO L93 Difference]: Finished difference Result 977 states and 3021 transitions. [2022-03-01 17:29:04,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:29:04,527 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:04,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:04,530 INFO L225 Difference]: With dead ends: 977 [2022-03-01 17:29:04,530 INFO L226 Difference]: Without dead ends: 897 [2022-03-01 17:29:04,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:29:04,531 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 156 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 530 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:04,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 314 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 643 Invalid, 0 Unknown, 530 Unchecked, 0.3s Time] [2022-03-01 17:29:04,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2022-03-01 17:29:04,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 690. [2022-03-01 17:29:04,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 3.084179970972424) internal successors, (2125), 689 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:04,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 2125 transitions. [2022-03-01 17:29:04,543 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 2125 transitions. Word has length 24 [2022-03-01 17:29:04,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:04,544 INFO L470 AbstractCegarLoop]: Abstraction has 690 states and 2125 transitions. [2022-03-01 17:29:04,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:04,544 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 2125 transitions. [2022-03-01 17:29:04,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:04,545 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:04,545 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:04,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-01 17:29:04,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:04,768 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:04,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:04,769 INFO L85 PathProgramCache]: Analyzing trace with hash 767206497, now seen corresponding path program 36 times [2022-03-01 17:29:04,769 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:04,769 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905173930] [2022-03-01 17:29:04,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:04,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:04,976 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:04,976 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:04,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905173930] [2022-03-01 17:29:04,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905173930] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:04,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376256939] [2022-03-01 17:29:04,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:29:04,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:04,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:04,978 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:04,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 17:29:05,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:29:05,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:05,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:29:05,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:05,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:29:05,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:29:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:05,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:05,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:05,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 49 [2022-03-01 17:29:05,836 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:05,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:29:05,841 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:05,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:29:05,864 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:05,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376256939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:05,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:05,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:29:05,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487411511] [2022-03-01 17:29:05,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:05,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:05,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:05,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:05,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:05,866 INFO L87 Difference]: Start difference. First operand 690 states and 2125 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:07,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:07,064 INFO L93 Difference]: Finished difference Result 1368 states and 3970 transitions. [2022-03-01 17:29:07,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:29:07,065 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:07,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:07,067 INFO L225 Difference]: With dead ends: 1368 [2022-03-01 17:29:07,067 INFO L226 Difference]: Without dead ends: 1242 [2022-03-01 17:29:07,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=244, Invalid=1162, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:29:07,067 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 243 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:07,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 292 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:29:07,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2022-03-01 17:29:07,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 680. [2022-03-01 17:29:07,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.09720176730486) internal successors, (2103), 679 states have internal predecessors, (2103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:07,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2103 transitions. [2022-03-01 17:29:07,078 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2103 transitions. Word has length 24 [2022-03-01 17:29:07,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:07,079 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 2103 transitions. [2022-03-01 17:29:07,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:07,079 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2103 transitions. [2022-03-01 17:29:07,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:07,080 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:07,080 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:07,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:07,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:07,281 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:07,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:07,281 INFO L85 PathProgramCache]: Analyzing trace with hash -959553497, now seen corresponding path program 37 times [2022-03-01 17:29:07,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:07,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112492220] [2022-03-01 17:29:07,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:07,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:07,502 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:07,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112492220] [2022-03-01 17:29:07,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112492220] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:07,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216618848] [2022-03-01 17:29:07,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:29:07,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:07,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:07,508 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:07,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 17:29:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:07,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:29:07,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:07,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:07,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:29:08,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:08,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:29:08,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:08,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:29:08,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:08,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:09,142 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:09,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-03-01 17:29:09,234 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:09,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:29:09,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:09,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:29:09,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:09,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216618848] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:09,263 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:09,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:29:09,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695839354] [2022-03-01 17:29:09,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:09,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:09,263 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:09,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:09,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:09,264 INFO L87 Difference]: Start difference. First operand 680 states and 2103 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:09,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:09,490 INFO L93 Difference]: Finished difference Result 783 states and 2397 transitions. [2022-03-01 17:29:09,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:29:09,490 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:09,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:09,491 INFO L225 Difference]: With dead ends: 783 [2022-03-01 17:29:09,491 INFO L226 Difference]: Without dead ends: 724 [2022-03-01 17:29:09,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:29:09,492 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 66 mSDsluCounter, 346 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 205 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:09,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 211 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 383 Invalid, 0 Unknown, 205 Unchecked, 0.2s Time] [2022-03-01 17:29:09,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-03-01 17:29:09,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 681. [2022-03-01 17:29:09,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 3.098529411764706) internal successors, (2107), 680 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:09,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 2107 transitions. [2022-03-01 17:29:09,502 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 2107 transitions. Word has length 24 [2022-03-01 17:29:09,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:09,502 INFO L470 AbstractCegarLoop]: Abstraction has 681 states and 2107 transitions. [2022-03-01 17:29:09,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:09,502 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 2107 transitions. [2022-03-01 17:29:09,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:09,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:09,504 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:09,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:09,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:09,704 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:09,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:09,704 INFO L85 PathProgramCache]: Analyzing trace with hash 204379677, now seen corresponding path program 38 times [2022-03-01 17:29:09,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:09,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570212144] [2022-03-01 17:29:09,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:09,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:09,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:09,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:09,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:09,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570212144] [2022-03-01 17:29:09,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570212144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:09,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552564096] [2022-03-01 17:29:09,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:29:09,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:09,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:09,907 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:09,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 17:29:09,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:29:09,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:09,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:29:09,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:09,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:29:10,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:10,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:29:10,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:10,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:29:10,387 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:10,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:11,019 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:11,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-03-01 17:29:11,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:11,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:29:11,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:11,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:29:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:11,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552564096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:11,094 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:11,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:29:11,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279757453] [2022-03-01 17:29:11,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:11,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:29:11,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:11,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:29:11,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:29:11,096 INFO L87 Difference]: Start difference. First operand 681 states and 2107 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:12,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:12,086 INFO L93 Difference]: Finished difference Result 1152 states and 3435 transitions. [2022-03-01 17:29:12,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:29:12,086 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:12,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:12,088 INFO L225 Difference]: With dead ends: 1152 [2022-03-01 17:29:12,088 INFO L226 Difference]: Without dead ends: 1033 [2022-03-01 17:29:12,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:29:12,089 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 150 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 1141 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:12,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 533 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1141 Invalid, 0 Unknown, 108 Unchecked, 0.5s Time] [2022-03-01 17:29:12,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2022-03-01 17:29:12,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 697. [2022-03-01 17:29:12,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 3.0919540229885056) internal successors, (2152), 696 states have internal predecessors, (2152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:12,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 2152 transitions. [2022-03-01 17:29:12,098 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 2152 transitions. Word has length 24 [2022-03-01 17:29:12,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:12,098 INFO L470 AbstractCegarLoop]: Abstraction has 697 states and 2152 transitions. [2022-03-01 17:29:12,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:12,098 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 2152 transitions. [2022-03-01 17:29:12,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:12,099 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:12,099 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:12,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:12,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-03-01 17:29:12,300 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:12,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:12,300 INFO L85 PathProgramCache]: Analyzing trace with hash -651002653, now seen corresponding path program 39 times [2022-03-01 17:29:12,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:12,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394473181] [2022-03-01 17:29:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:12,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:12,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:12,532 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:12,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394473181] [2022-03-01 17:29:12,532 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394473181] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:12,532 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215783094] [2022-03-01 17:29:12,532 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:29:12,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:12,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:12,536 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:12,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 17:29:12,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:29:12,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:12,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:29:12,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:12,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:29:12,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:12,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:29:12,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:12,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:13,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:13,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-01 17:29:13,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:13,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:29:13,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:13,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:29:13,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:13,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215783094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:13,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:13,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:29:13,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612579346] [2022-03-01 17:29:13,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:13,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:13,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:13,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:13,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:13,669 INFO L87 Difference]: Start difference. First operand 697 states and 2152 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:14,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:14,345 INFO L93 Difference]: Finished difference Result 1218 states and 3598 transitions. [2022-03-01 17:29:14,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:29:14,346 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:14,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:14,348 INFO L225 Difference]: With dead ends: 1218 [2022-03-01 17:29:14,348 INFO L226 Difference]: Without dead ends: 1156 [2022-03-01 17:29:14,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:29:14,348 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 123 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:14,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 301 Invalid, 986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 845 Invalid, 0 Unknown, 98 Unchecked, 0.4s Time] [2022-03-01 17:29:14,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-03-01 17:29:14,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 703. [2022-03-01 17:29:14,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 703 states, 702 states have (on average 3.0997150997150995) internal successors, (2176), 702 states have internal predecessors, (2176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:14,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 703 states to 703 states and 2176 transitions. [2022-03-01 17:29:14,369 INFO L78 Accepts]: Start accepts. Automaton has 703 states and 2176 transitions. Word has length 24 [2022-03-01 17:29:14,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:14,369 INFO L470 AbstractCegarLoop]: Abstraction has 703 states and 2176 transitions. [2022-03-01 17:29:14,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:14,369 INFO L276 IsEmpty]: Start isEmpty. Operand 703 states and 2176 transitions. [2022-03-01 17:29:14,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:14,371 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:14,371 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:14,387 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:14,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-01 17:29:14,571 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:14,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:14,572 INFO L85 PathProgramCache]: Analyzing trace with hash 488052761, now seen corresponding path program 40 times [2022-03-01 17:29:14,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:14,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308302755] [2022-03-01 17:29:14,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:14,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:14,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:14,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:14,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308302755] [2022-03-01 17:29:14,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308302755] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:14,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776338532] [2022-03-01 17:29:14,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:29:14,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:14,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:14,822 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:14,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 17:29:14,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:29:14,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:14,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:29:14,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:14,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:14,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:29:15,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:15,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:29:15,276 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:15,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:29:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:15,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:16,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:16,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-03-01 17:29:16,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:16,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:29:16,373 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:16,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:29:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:16,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776338532] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:16,399 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:16,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:29:16,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888640908] [2022-03-01 17:29:16,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:16,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:16,400 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:16,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:16,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:16,400 INFO L87 Difference]: Start difference. First operand 703 states and 2176 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:20,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:20,193 INFO L93 Difference]: Finished difference Result 1643 states and 4589 transitions. [2022-03-01 17:29:20,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:29:20,194 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:20,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:20,196 INFO L225 Difference]: With dead ends: 1643 [2022-03-01 17:29:20,196 INFO L226 Difference]: Without dead ends: 1439 [2022-03-01 17:29:20,197 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=465, Invalid=2615, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 17:29:20,197 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 351 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:20,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 401 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1016 Invalid, 0 Unknown, 228 Unchecked, 0.5s Time] [2022-03-01 17:29:20,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1439 states. [2022-03-01 17:29:20,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1439 to 710. [2022-03-01 17:29:20,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 3.1198871650211566) internal successors, (2212), 709 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2212 transitions. [2022-03-01 17:29:20,212 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2212 transitions. Word has length 24 [2022-03-01 17:29:20,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:20,212 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 2212 transitions. [2022-03-01 17:29:20,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:20,212 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2212 transitions. [2022-03-01 17:29:20,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:20,213 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:20,213 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:20,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-03-01 17:29:20,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-01 17:29:20,415 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:20,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:20,415 INFO L85 PathProgramCache]: Analyzing trace with hash 993510169, now seen corresponding path program 41 times [2022-03-01 17:29:20,415 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:20,416 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62083411] [2022-03-01 17:29:20,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:20,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:20,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:20,708 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:20,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62083411] [2022-03-01 17:29:20,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62083411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:20,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003690756] [2022-03-01 17:29:20,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:29:20,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:20,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:20,709 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:20,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 17:29:20,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:29:20,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:20,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:29:20,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:20,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:20,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:29:21,102 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:21,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:29:21,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:21,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:29:21,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:21,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:22,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:22,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-01 17:29:22,218 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:22,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:29:22,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:22,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:29:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:22,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003690756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:22,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:22,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:29:22,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492557297] [2022-03-01 17:29:22,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:22,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:29:22,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:22,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:29:22,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:29:22,246 INFO L87 Difference]: Start difference. First operand 710 states and 2212 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:22,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:22,482 INFO L93 Difference]: Finished difference Result 793 states and 2442 transitions. [2022-03-01 17:29:22,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:29:22,482 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:22,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:22,484 INFO L225 Difference]: With dead ends: 793 [2022-03-01 17:29:22,484 INFO L226 Difference]: Without dead ends: 762 [2022-03-01 17:29:22,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:22,484 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 188 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:22,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 192 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 472 Invalid, 0 Unknown, 188 Unchecked, 0.2s Time] [2022-03-01 17:29:22,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2022-03-01 17:29:22,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 710. [2022-03-01 17:29:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 709 states have (on average 3.1198871650211566) internal successors, (2212), 709 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:22,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 2212 transitions. [2022-03-01 17:29:22,494 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 2212 transitions. Word has length 24 [2022-03-01 17:29:22,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:22,494 INFO L470 AbstractCegarLoop]: Abstraction has 710 states and 2212 transitions. [2022-03-01 17:29:22,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:22,494 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 2212 transitions. [2022-03-01 17:29:22,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:22,495 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:22,495 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:22,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-01 17:29:22,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-03-01 17:29:22,696 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:22,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:22,697 INFO L85 PathProgramCache]: Analyzing trace with hash 2026002287, now seen corresponding path program 42 times [2022-03-01 17:29:22,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:22,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258719663] [2022-03-01 17:29:22,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:22,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:22,901 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:22,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:22,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258719663] [2022-03-01 17:29:22,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258719663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:22,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828590103] [2022-03-01 17:29:22,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:29:22,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:22,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:22,903 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:22,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 17:29:22,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:29:22,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:22,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-01 17:29:22,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:23,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:29:23,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:29:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:23,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:23,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:23,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-03-01 17:29:23,827 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:23,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:29:23,832 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:23,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:29:23,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:23,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828590103] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:23,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:23,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 24 [2022-03-01 17:29:23,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687803416] [2022-03-01 17:29:23,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:23,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:29:23,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:23,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:29:23,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:29:23,854 INFO L87 Difference]: Start difference. First operand 710 states and 2212 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:24,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:24,666 INFO L93 Difference]: Finished difference Result 1077 states and 3237 transitions. [2022-03-01 17:29:24,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:29:24,667 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:24,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:24,668 INFO L225 Difference]: With dead ends: 1077 [2022-03-01 17:29:24,668 INFO L226 Difference]: Without dead ends: 986 [2022-03-01 17:29:24,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:29:24,669 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 123 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:24,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 282 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 853 Invalid, 0 Unknown, 12 Unchecked, 0.4s Time] [2022-03-01 17:29:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2022-03-01 17:29:24,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 687. [2022-03-01 17:29:24,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 686 states have (on average 3.1034985422740524) internal successors, (2129), 686 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:24,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 2129 transitions. [2022-03-01 17:29:24,686 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 2129 transitions. Word has length 24 [2022-03-01 17:29:24,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:24,686 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 2129 transitions. [2022-03-01 17:29:24,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:24,686 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 2129 transitions. [2022-03-01 17:29:24,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:24,687 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:24,687 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:24,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:24,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:24,888 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:24,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:24,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1582657373, now seen corresponding path program 43 times [2022-03-01 17:29:24,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:24,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695974698] [2022-03-01 17:29:24,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:24,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:25,053 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:25,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:25,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695974698] [2022-03-01 17:29:25,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695974698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:25,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049922322] [2022-03-01 17:29:25,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:29:25,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:25,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:25,055 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:25,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 17:29:25,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:25,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:29:25,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:25,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:29:25,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:29:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:25,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:25,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:25,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-03-01 17:29:25,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:25,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:29:25,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:25,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:29:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:25,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049922322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:25,936 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:25,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:29:25,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952895149] [2022-03-01 17:29:25,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:25,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:29:25,936 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:25,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:29:25,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:29:25,937 INFO L87 Difference]: Start difference. First operand 687 states and 2129 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:26,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:26,403 INFO L93 Difference]: Finished difference Result 892 states and 2712 transitions. [2022-03-01 17:29:26,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:29:26,404 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:26,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:26,405 INFO L225 Difference]: With dead ends: 892 [2022-03-01 17:29:26,405 INFO L226 Difference]: Without dead ends: 802 [2022-03-01 17:29:26,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:29:26,406 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 116 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:26,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 235 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:29:26,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 802 states. [2022-03-01 17:29:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 802 to 708. [2022-03-01 17:29:26,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 3.1103253182461104) internal successors, (2199), 707 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:26,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2199 transitions. [2022-03-01 17:29:26,414 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2199 transitions. Word has length 24 [2022-03-01 17:29:26,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:26,415 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 2199 transitions. [2022-03-01 17:29:26,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2199 transitions. [2022-03-01 17:29:26,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:26,416 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:26,416 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:26,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-01 17:29:26,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-01 17:29:26,616 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:26,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:26,617 INFO L85 PathProgramCache]: Analyzing trace with hash 496636455, now seen corresponding path program 44 times [2022-03-01 17:29:26,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:26,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688884216] [2022-03-01 17:29:26,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:26,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:26,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:26,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:26,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688884216] [2022-03-01 17:29:26,806 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688884216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:26,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747011520] [2022-03-01 17:29:26,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:29:26,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:26,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:26,808 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:26,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 17:29:26,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:29:26,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:26,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:29:26,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:26,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:29:26,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:29:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:27,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:27,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:27,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-03-01 17:29:27,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:27,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:29:27,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:27,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:29:27,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:27,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747011520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:27,695 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:27,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:29:27,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045863648] [2022-03-01 17:29:27,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:27,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:29:27,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:27,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:29:27,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:29:27,695 INFO L87 Difference]: Start difference. First operand 708 states and 2199 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:28,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:28,053 INFO L93 Difference]: Finished difference Result 812 states and 2505 transitions. [2022-03-01 17:29:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:29:28,053 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:28,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:28,054 INFO L225 Difference]: With dead ends: 812 [2022-03-01 17:29:28,054 INFO L226 Difference]: Without dead ends: 781 [2022-03-01 17:29:28,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:29:28,055 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 95 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:28,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 195 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:29:28,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2022-03-01 17:29:28,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 708. [2022-03-01 17:29:28,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 707 states have (on average 3.1103253182461104) internal successors, (2199), 707 states have internal predecessors, (2199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:28,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 2199 transitions. [2022-03-01 17:29:28,064 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 2199 transitions. Word has length 24 [2022-03-01 17:29:28,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:28,064 INFO L470 AbstractCegarLoop]: Abstraction has 708 states and 2199 transitions. [2022-03-01 17:29:28,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:28,064 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 2199 transitions. [2022-03-01 17:29:28,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:28,065 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:28,065 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:28,082 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-01 17:29:28,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-01 17:29:28,266 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:28,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:28,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1652160081, now seen corresponding path program 45 times [2022-03-01 17:29:28,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:28,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785217791] [2022-03-01 17:29:28,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:28,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:28,449 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:28,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785217791] [2022-03-01 17:29:28,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785217791] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:28,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214751062] [2022-03-01 17:29:28,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:29:28,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:28,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:28,452 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:28,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 17:29:28,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:29:28,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:28,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:29:28,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:28,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:29:28,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:29:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:28,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:29,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:29,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-03-01 17:29:29,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:29,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:29:29,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:29,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:29:29,271 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:29,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214751062] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:29,271 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:29,271 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:29:29,271 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922429591] [2022-03-01 17:29:29,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:29,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:29:29,271 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:29,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:29:29,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:29:29,272 INFO L87 Difference]: Start difference. First operand 708 states and 2199 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:29,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:29,550 INFO L93 Difference]: Finished difference Result 834 states and 2570 transitions. [2022-03-01 17:29:29,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:29:29,550 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:29,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:29,552 INFO L225 Difference]: With dead ends: 834 [2022-03-01 17:29:29,552 INFO L226 Difference]: Without dead ends: 803 [2022-03-01 17:29:29,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:29:29,552 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 101 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:29,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 154 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:29:29,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-03-01 17:29:29,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 730. [2022-03-01 17:29:29,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.1056241426611795) internal successors, (2264), 729 states have internal predecessors, (2264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:29,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2264 transitions. [2022-03-01 17:29:29,561 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2264 transitions. Word has length 24 [2022-03-01 17:29:29,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:29,562 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 2264 transitions. [2022-03-01 17:29:29,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:29,562 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2264 transitions. [2022-03-01 17:29:29,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:29,563 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:29,563 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:29,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:29,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-03-01 17:29:29,764 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:29,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:29,765 INFO L85 PathProgramCache]: Analyzing trace with hash 257836915, now seen corresponding path program 46 times [2022-03-01 17:29:29,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:29,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302794212] [2022-03-01 17:29:29,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:29,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:30,011 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:30,012 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:30,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302794212] [2022-03-01 17:29:30,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302794212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:30,012 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228356529] [2022-03-01 17:29:30,012 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:29:30,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:30,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:30,013 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:30,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 17:29:30,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:29:30,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:30,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:29:30,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:30,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:29:30,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:29:30,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:30,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:30,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:30,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-03-01 17:29:31,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:31,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:29:31,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:31,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:29:31,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:31,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228356529] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:31,058 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:31,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:29:31,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470644621] [2022-03-01 17:29:31,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:31,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:31,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:31,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:31,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:31,059 INFO L87 Difference]: Start difference. First operand 730 states and 2264 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:32,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:32,012 INFO L93 Difference]: Finished difference Result 1060 states and 3170 transitions. [2022-03-01 17:29:32,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:29:32,012 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:32,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:32,014 INFO L225 Difference]: With dead ends: 1060 [2022-03-01 17:29:32,014 INFO L226 Difference]: Without dead ends: 943 [2022-03-01 17:29:32,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:29:32,014 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 115 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:32,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 288 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:29:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-03-01 17:29:32,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 745. [2022-03-01 17:29:32,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 3.120967741935484) internal successors, (2322), 744 states have internal predecessors, (2322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:32,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 2322 transitions. [2022-03-01 17:29:32,025 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 2322 transitions. Word has length 24 [2022-03-01 17:29:32,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:32,025 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 2322 transitions. [2022-03-01 17:29:32,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:32,025 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 2322 transitions. [2022-03-01 17:29:32,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:32,026 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:32,026 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:32,042 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:32,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:32,226 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:32,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:32,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1421770089, now seen corresponding path program 47 times [2022-03-01 17:29:32,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:32,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135619563] [2022-03-01 17:29:32,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:32,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:32,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:32,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135619563] [2022-03-01 17:29:32,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135619563] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:32,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240291431] [2022-03-01 17:29:32,446 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:29:32,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:32,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:32,448 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:32,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 17:29:32,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:29:32,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:32,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:29:32,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:32,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:29:32,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:29:32,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:32,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:33,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:33,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:29:33,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:33,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:29:33,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:33,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:29:33,582 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:33,582 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240291431] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:33,582 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:33,583 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:29:33,583 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825802904] [2022-03-01 17:29:33,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:33,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:33,583 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:33,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:33,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:33,583 INFO L87 Difference]: Start difference. First operand 745 states and 2322 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:34,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:34,531 INFO L93 Difference]: Finished difference Result 1131 states and 3402 transitions. [2022-03-01 17:29:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:29:34,531 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:34,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:34,533 INFO L225 Difference]: With dead ends: 1131 [2022-03-01 17:29:34,533 INFO L226 Difference]: Without dead ends: 1030 [2022-03-01 17:29:34,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:29:34,534 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 126 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:34,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 295 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:29:34,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-03-01 17:29:34,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 752. [2022-03-01 17:29:34,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.11185086551265) internal successors, (2337), 751 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2337 transitions. [2022-03-01 17:29:34,546 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2337 transitions. Word has length 24 [2022-03-01 17:29:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:34,546 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2337 transitions. [2022-03-01 17:29:34,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2337 transitions. [2022-03-01 17:29:34,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:34,547 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:34,548 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:34,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-01 17:29:34,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:34,748 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:34,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:34,749 INFO L85 PathProgramCache]: Analyzing trace with hash 347156531, now seen corresponding path program 48 times [2022-03-01 17:29:34,749 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:34,749 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565534893] [2022-03-01 17:29:34,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:34,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:34,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:34,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:34,994 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:34,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565534893] [2022-03-01 17:29:34,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565534893] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:34,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519301094] [2022-03-01 17:29:34,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:29:34,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:34,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:35,000 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:35,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 17:29:35,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:29:35,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:35,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:29:35,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:35,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:35,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:29:35,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:35,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:29:35,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:35,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:29:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:35,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:36,196 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:36,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-03-01 17:29:36,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:36,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:29:36,395 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:36,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:29:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:36,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [519301094] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:36,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:36,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:29:36,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596698526] [2022-03-01 17:29:36,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:36,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:36,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:36,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:36,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:36,418 INFO L87 Difference]: Start difference. First operand 752 states and 2337 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:36,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:36,799 INFO L93 Difference]: Finished difference Result 834 states and 2571 transitions. [2022-03-01 17:29:36,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:29:36,799 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:36,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:36,801 INFO L225 Difference]: With dead ends: 834 [2022-03-01 17:29:36,801 INFO L226 Difference]: Without dead ends: 789 [2022-03-01 17:29:36,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:29:36,802 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 46 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:36,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 210 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 602 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-03-01 17:29:36,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789 states. [2022-03-01 17:29:36,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789 to 756. [2022-03-01 17:29:36,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 3.117880794701987) internal successors, (2354), 755 states have internal predecessors, (2354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 2354 transitions. [2022-03-01 17:29:36,813 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 2354 transitions. Word has length 24 [2022-03-01 17:29:36,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:36,814 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 2354 transitions. [2022-03-01 17:29:36,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 2354 transitions. [2022-03-01 17:29:36,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:36,815 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:36,815 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:36,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-01 17:29:37,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:37,016 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:37,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:37,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1705443173, now seen corresponding path program 49 times [2022-03-01 17:29:37,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:37,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7337329] [2022-03-01 17:29:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:37,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:37,310 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:37,310 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:37,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7337329] [2022-03-01 17:29:37,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7337329] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:37,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269362535] [2022-03-01 17:29:37,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:29:37,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:37,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:37,316 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:37,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 17:29:37,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:37,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:29:37,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:37,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:37,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:29:37,666 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:37,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:29:37,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:37,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:29:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:37,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:38,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:38,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 99 [2022-03-01 17:29:38,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:38,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:29:38,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:38,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:29:38,848 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:38,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269362535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:38,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:38,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:29:38,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015108804] [2022-03-01 17:29:38,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:38,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:38,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:38,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:38,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:38,850 INFO L87 Difference]: Start difference. First operand 756 states and 2354 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:41,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:41,226 INFO L93 Difference]: Finished difference Result 1657 states and 4613 transitions. [2022-03-01 17:29:41,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:29:41,226 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:41,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:41,229 INFO L225 Difference]: With dead ends: 1657 [2022-03-01 17:29:41,229 INFO L226 Difference]: Without dead ends: 1453 [2022-03-01 17:29:41,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=291, Invalid=1601, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:29:41,229 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 306 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:41,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 377 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 984 Invalid, 0 Unknown, 190 Unchecked, 0.5s Time] [2022-03-01 17:29:41,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2022-03-01 17:29:41,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 757. [2022-03-01 17:29:41,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 757 states, 756 states have (on average 3.1203703703703702) internal successors, (2359), 756 states have internal predecessors, (2359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 757 states to 757 states and 2359 transitions. [2022-03-01 17:29:41,243 INFO L78 Accepts]: Start accepts. Automaton has 757 states and 2359 transitions. Word has length 24 [2022-03-01 17:29:41,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:41,243 INFO L470 AbstractCegarLoop]: Abstraction has 757 states and 2359 transitions. [2022-03-01 17:29:41,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:41,243 INFO L276 IsEmpty]: Start isEmpty. Operand 757 states and 2359 transitions. [2022-03-01 17:29:41,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:41,244 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:41,244 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:41,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:41,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-01 17:29:41,445 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:41,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:41,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2084066715, now seen corresponding path program 50 times [2022-03-01 17:29:41,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:41,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428029078] [2022-03-01 17:29:41,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:41,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:41,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:41,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:41,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428029078] [2022-03-01 17:29:41,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428029078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:41,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430480155] [2022-03-01 17:29:41,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:29:41,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:41,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:41,669 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:41,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 17:29:41,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:29:41,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:41,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:29:41,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:41,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:29:41,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:41,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:29:41,848 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:41,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:29:42,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:42,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:42,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:42,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 65 [2022-03-01 17:29:42,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:42,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:29:42,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:42,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:29:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:42,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430480155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:42,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:42,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:29:42,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247041750] [2022-03-01 17:29:42,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:42,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:29:42,884 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:42,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:29:42,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:29:42,885 INFO L87 Difference]: Start difference. First operand 757 states and 2359 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:43,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:43,689 INFO L93 Difference]: Finished difference Result 1257 states and 3711 transitions. [2022-03-01 17:29:43,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:29:43,689 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:43,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:43,691 INFO L225 Difference]: With dead ends: 1257 [2022-03-01 17:29:43,691 INFO L226 Difference]: Without dead ends: 1141 [2022-03-01 17:29:43,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:29:43,692 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 158 mSDsluCounter, 613 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:43,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 331 Invalid, 992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 855 Invalid, 0 Unknown, 96 Unchecked, 0.4s Time] [2022-03-01 17:29:43,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2022-03-01 17:29:43,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 763. [2022-03-01 17:29:43,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 762 states have (on average 3.1325459317585302) internal successors, (2387), 762 states have internal predecessors, (2387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:43,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 2387 transitions. [2022-03-01 17:29:43,704 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 2387 transitions. Word has length 24 [2022-03-01 17:29:43,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:43,704 INFO L470 AbstractCegarLoop]: Abstraction has 763 states and 2387 transitions. [2022-03-01 17:29:43,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:43,704 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 2387 transitions. [2022-03-01 17:29:43,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:43,705 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:43,706 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:43,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:43,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-01 17:29:43,907 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:43,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:43,908 INFO L85 PathProgramCache]: Analyzing trace with hash 752430849, now seen corresponding path program 51 times [2022-03-01 17:29:43,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:43,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278401725] [2022-03-01 17:29:43,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:43,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:43,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:44,112 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:44,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278401725] [2022-03-01 17:29:44,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278401725] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:44,113 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983475835] [2022-03-01 17:29:44,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:29:44,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:44,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:44,116 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:44,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 17:29:44,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:29:44,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:44,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:29:44,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:44,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:29:44,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:29:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:44,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:45,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:45,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:29:45,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:45,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:29:45,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:45,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:29:45,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:45,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983475835] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:45,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:45,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:29:45,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905467655] [2022-03-01 17:29:45,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:45,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:29:45,384 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:45,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:29:45,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:29:45,384 INFO L87 Difference]: Start difference. First operand 763 states and 2387 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:45,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:45,717 INFO L93 Difference]: Finished difference Result 982 states and 3008 transitions. [2022-03-01 17:29:45,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:29:45,717 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:45,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:45,719 INFO L225 Difference]: With dead ends: 982 [2022-03-01 17:29:45,719 INFO L226 Difference]: Without dead ends: 932 [2022-03-01 17:29:45,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:45,719 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 91 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:45,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 227 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:29:45,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-03-01 17:29:45,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 750. [2022-03-01 17:29:45,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 750 states, 749 states have (on average 3.114819759679573) internal successors, (2333), 749 states have internal predecessors, (2333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:45,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 750 states to 750 states and 2333 transitions. [2022-03-01 17:29:45,729 INFO L78 Accepts]: Start accepts. Automaton has 750 states and 2333 transitions. Word has length 24 [2022-03-01 17:29:45,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:45,729 INFO L470 AbstractCegarLoop]: Abstraction has 750 states and 2333 transitions. [2022-03-01 17:29:45,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:45,730 INFO L276 IsEmpty]: Start isEmpty. Operand 750 states and 2333 transitions. [2022-03-01 17:29:45,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:45,731 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:45,731 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:45,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-01 17:29:45,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-01 17:29:45,931 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:45,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:45,932 INFO L85 PathProgramCache]: Analyzing trace with hash -873204247, now seen corresponding path program 52 times [2022-03-01 17:29:45,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:45,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410867092] [2022-03-01 17:29:45,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:45,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:45,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:46,105 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:46,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410867092] [2022-03-01 17:29:46,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410867092] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:46,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262687627] [2022-03-01 17:29:46,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:29:46,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:46,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:46,106 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:46,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 17:29:46,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:29:46,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:46,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:29:46,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:46,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:46,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:29:46,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:46,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:29:46,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:46,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:29:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:46,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:46,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:46,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-03-01 17:29:47,158 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:47,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:29:47,162 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:47,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:29:47,184 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:47,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262687627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:47,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:47,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:29:47,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159894618] [2022-03-01 17:29:47,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:47,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:47,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:47,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:47,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:47,186 INFO L87 Difference]: Start difference. First operand 750 states and 2333 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:48,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:48,014 INFO L93 Difference]: Finished difference Result 1032 states and 3068 transitions. [2022-03-01 17:29:48,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:29:48,014 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:48,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:48,015 INFO L225 Difference]: With dead ends: 1032 [2022-03-01 17:29:48,015 INFO L226 Difference]: Without dead ends: 910 [2022-03-01 17:29:48,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:29:48,016 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 120 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:48,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 235 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 650 Invalid, 0 Unknown, 67 Unchecked, 0.3s Time] [2022-03-01 17:29:48,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-03-01 17:29:48,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 771. [2022-03-01 17:29:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 770 states have (on average 3.138961038961039) internal successors, (2417), 770 states have internal predecessors, (2417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 2417 transitions. [2022-03-01 17:29:48,026 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 2417 transitions. Word has length 24 [2022-03-01 17:29:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:48,026 INFO L470 AbstractCegarLoop]: Abstraction has 771 states and 2417 transitions. [2022-03-01 17:29:48,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:48,026 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 2417 transitions. [2022-03-01 17:29:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:48,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:48,027 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:48,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-01 17:29:48,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-01 17:29:48,228 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:48,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:48,228 INFO L85 PathProgramCache]: Analyzing trace with hash -286288645, now seen corresponding path program 53 times [2022-03-01 17:29:48,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:48,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051723079] [2022-03-01 17:29:48,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:48,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:48,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:48,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051723079] [2022-03-01 17:29:48,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051723079] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:48,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285894014] [2022-03-01 17:29:48,382 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:29:48,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:48,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:48,384 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:48,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 17:29:48,425 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:29:48,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:48,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:29:48,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:48,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-01 17:29:48,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:29:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:48,669 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:49,088 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:49,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 75 [2022-03-01 17:29:49,262 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:49,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:29:49,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:49,266 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:29:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:49,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285894014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:49,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:49,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:29:49,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895636621] [2022-03-01 17:29:49,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:49,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:29:49,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:49,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:29:49,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:29:49,288 INFO L87 Difference]: Start difference. First operand 771 states and 2417 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:49,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:49,735 INFO L93 Difference]: Finished difference Result 949 states and 2910 transitions. [2022-03-01 17:29:49,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:29:49,735 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:49,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:49,737 INFO L225 Difference]: With dead ends: 949 [2022-03-01 17:29:49,737 INFO L226 Difference]: Without dead ends: 862 [2022-03-01 17:29:49,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:29:49,738 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 66 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 853 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:49,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 218 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 853 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:29:49,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 862 states. [2022-03-01 17:29:49,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 862 to 789. [2022-03-01 17:29:49,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 789 states, 788 states have (on average 3.1269035532994924) internal successors, (2464), 788 states have internal predecessors, (2464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:49,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 789 states to 789 states and 2464 transitions. [2022-03-01 17:29:49,751 INFO L78 Accepts]: Start accepts. Automaton has 789 states and 2464 transitions. Word has length 24 [2022-03-01 17:29:49,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:49,751 INFO L470 AbstractCegarLoop]: Abstraction has 789 states and 2464 transitions. [2022-03-01 17:29:49,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:49,751 INFO L276 IsEmpty]: Start isEmpty. Operand 789 states and 2464 transitions. [2022-03-01 17:29:49,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:49,753 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:49,753 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:49,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:49,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-01 17:29:49,974 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:49,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:49,974 INFO L85 PathProgramCache]: Analyzing trace with hash 1152180817, now seen corresponding path program 54 times [2022-03-01 17:29:49,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:49,974 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488138024] [2022-03-01 17:29:49,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:49,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:50,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:50,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488138024] [2022-03-01 17:29:50,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488138024] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:50,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43191238] [2022-03-01 17:29:50,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:29:50,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:50,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:50,139 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:50,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 17:29:50,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:29:50,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:50,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:29:50,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:50,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:50,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:29:50,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:50,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:29:50,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:50,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:29:50,489 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:50,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:50,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:50,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 74 [2022-03-01 17:29:51,047 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:51,047 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:29:51,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:51,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:29:51,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:51,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43191238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:51,079 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:51,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:29:51,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399806146] [2022-03-01 17:29:51,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:51,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:29:51,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:51,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:29:51,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:29:51,080 INFO L87 Difference]: Start difference. First operand 789 states and 2464 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:51,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:51,268 INFO L93 Difference]: Finished difference Result 856 states and 2659 transitions. [2022-03-01 17:29:51,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:29:51,269 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:51,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:51,270 INFO L225 Difference]: With dead ends: 856 [2022-03-01 17:29:51,270 INFO L226 Difference]: Without dead ends: 829 [2022-03-01 17:29:51,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:51,270 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:51,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 171 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 402 Invalid, 0 Unknown, 241 Unchecked, 0.2s Time] [2022-03-01 17:29:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2022-03-01 17:29:51,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 783. [2022-03-01 17:29:51,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 782 states have (on average 3.1278772378516626) internal successors, (2446), 782 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:51,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 2446 transitions. [2022-03-01 17:29:51,280 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 2446 transitions. Word has length 24 [2022-03-01 17:29:51,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:51,280 INFO L470 AbstractCegarLoop]: Abstraction has 783 states and 2446 transitions. [2022-03-01 17:29:51,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:51,280 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 2446 transitions. [2022-03-01 17:29:51,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:51,281 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:51,281 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:51,297 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:51,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-01 17:29:51,482 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:51,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:51,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1454965027, now seen corresponding path program 55 times [2022-03-01 17:29:51,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:51,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324680016] [2022-03-01 17:29:51,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:51,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:51,732 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:51,732 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:51,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324680016] [2022-03-01 17:29:51,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324680016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:51,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479237736] [2022-03-01 17:29:51,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:29:51,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:51,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:51,734 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:51,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 17:29:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:51,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:29:51,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:51,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:51,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:29:51,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:51,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:29:51,961 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:51,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:29:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:52,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:52,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:52,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-03-01 17:29:53,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:53,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:29:53,031 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:53,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:29:53,057 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:53,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479237736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:53,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:53,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:29:53,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933553366] [2022-03-01 17:29:53,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:53,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:53,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:53,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:53,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:53,058 INFO L87 Difference]: Start difference. First operand 783 states and 2446 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:54,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:54,871 INFO L93 Difference]: Finished difference Result 1476 states and 4187 transitions. [2022-03-01 17:29:54,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:29:54,877 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:54,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:54,879 INFO L225 Difference]: With dead ends: 1476 [2022-03-01 17:29:54,879 INFO L226 Difference]: Without dead ends: 1303 [2022-03-01 17:29:54,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:29:54,880 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 325 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 1184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:54,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 400 Invalid, 1184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1023 Invalid, 0 Unknown, 87 Unchecked, 0.5s Time] [2022-03-01 17:29:54,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-03-01 17:29:54,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 790. [2022-03-01 17:29:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 790 states, 789 states have (on average 3.1444866920152093) internal successors, (2481), 789 states have internal predecessors, (2481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 790 states to 790 states and 2481 transitions. [2022-03-01 17:29:54,892 INFO L78 Accepts]: Start accepts. Automaton has 790 states and 2481 transitions. Word has length 24 [2022-03-01 17:29:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:54,892 INFO L470 AbstractCegarLoop]: Abstraction has 790 states and 2481 transitions. [2022-03-01 17:29:54,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:54,893 INFO L276 IsEmpty]: Start isEmpty. Operand 790 states and 2481 transitions. [2022-03-01 17:29:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:54,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:54,894 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:54,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-01 17:29:55,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:55,094 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:55,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:55,095 INFO L85 PathProgramCache]: Analyzing trace with hash -949507619, now seen corresponding path program 56 times [2022-03-01 17:29:55,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:55,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752616897] [2022-03-01 17:29:55,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:55,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:55,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:55,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:55,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752616897] [2022-03-01 17:29:55,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752616897] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:55,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091527137] [2022-03-01 17:29:55,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:29:55,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:55,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:55,312 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:55,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 17:29:55,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:29:55,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:55,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:29:55,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:55,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:29:55,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:29:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:55,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:56,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:56,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:29:56,590 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:56,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:29:56,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:56,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:29:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:56,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091527137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:56,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:56,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:29:56,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006563415] [2022-03-01 17:29:56,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:56,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:56,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:56,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:56,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:56,614 INFO L87 Difference]: Start difference. First operand 790 states and 2481 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:58,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:58,005 INFO L93 Difference]: Finished difference Result 1328 states and 3939 transitions. [2022-03-01 17:29:58,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:29:58,005 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:58,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:58,007 INFO L225 Difference]: With dead ends: 1328 [2022-03-01 17:29:58,007 INFO L226 Difference]: Without dead ends: 1167 [2022-03-01 17:29:58,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:29:58,008 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 168 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1042 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:58,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 295 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1042 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:29:58,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2022-03-01 17:29:58,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 816. [2022-03-01 17:29:58,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 3.1607361963190184) internal successors, (2576), 815 states have internal predecessors, (2576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:58,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 2576 transitions. [2022-03-01 17:29:58,023 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 2576 transitions. Word has length 24 [2022-03-01 17:29:58,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:58,023 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 2576 transitions. [2022-03-01 17:29:58,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:58,023 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 2576 transitions. [2022-03-01 17:29:58,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:58,025 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:58,025 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:58,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:58,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:58,247 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:29:58,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:58,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1044985101, now seen corresponding path program 57 times [2022-03-01 17:29:58,247 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:58,247 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968340773] [2022-03-01 17:29:58,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:58,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:58,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:58,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968340773] [2022-03-01 17:29:58,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968340773] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:58,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739956909] [2022-03-01 17:29:58,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:29:58,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:58,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:58,512 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:58,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 17:29:58,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:29:58,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:58,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:29:58,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:58,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:58,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:29:58,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:58,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:29:58,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:58,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:29:58,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:58,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:59,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:59,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-03-01 17:29:59,690 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:59,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:29:59,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:59,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:29:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:29:59,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739956909] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:59,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:59,725 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:29:59,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474700039] [2022-03-01 17:29:59,725 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:59,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:59,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:59,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:59,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:59,726 INFO L87 Difference]: Start difference. First operand 816 states and 2576 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:59,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:59,952 INFO L93 Difference]: Finished difference Result 921 states and 2878 transitions. [2022-03-01 17:29:59,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:29:59,952 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:29:59,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:59,954 INFO L225 Difference]: With dead ends: 921 [2022-03-01 17:29:59,954 INFO L226 Difference]: Without dead ends: 890 [2022-03-01 17:29:59,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:29:59,954 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:59,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 186 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 503 Invalid, 0 Unknown, 294 Unchecked, 0.2s Time] [2022-03-01 17:29:59,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-03-01 17:29:59,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 815. [2022-03-01 17:29:59,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.152334152334152) internal successors, (2566), 814 states have internal predecessors, (2566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:59,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2566 transitions. [2022-03-01 17:29:59,966 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2566 transitions. Word has length 24 [2022-03-01 17:29:59,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:59,966 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 2566 transitions. [2022-03-01 17:29:59,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:59,966 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2566 transitions. [2022-03-01 17:29:59,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:29:59,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:59,968 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:59,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-03-01 17:30:00,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:00,181 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:00,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:00,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1175917381, now seen corresponding path program 58 times [2022-03-01 17:30:00,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:00,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393923187] [2022-03-01 17:30:00,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:00,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:00,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:00,405 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:00,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393923187] [2022-03-01 17:30:00,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393923187] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:00,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7867405] [2022-03-01 17:30:00,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:30:00,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:00,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:00,406 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:00,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 17:30:00,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:30:00,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:00,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:00,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:00,552 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:00,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:30:00,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:00,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:30:00,796 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:00,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:30:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:00,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:01,548 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:01,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:30:01,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:01,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:30:01,735 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:01,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:30:01,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:01,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7867405] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:01,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:01,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:30:01,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679610822] [2022-03-01 17:30:01,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:01,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:01,757 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:01,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:01,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:01,758 INFO L87 Difference]: Start difference. First operand 815 states and 2566 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:01,943 INFO L93 Difference]: Finished difference Result 951 states and 2914 transitions. [2022-03-01 17:30:01,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:30:01,943 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:01,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:01,945 INFO L225 Difference]: With dead ends: 951 [2022-03-01 17:30:01,945 INFO L226 Difference]: Without dead ends: 893 [2022-03-01 17:30:01,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:30:01,945 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 37 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:01,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 227 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 382 Invalid, 0 Unknown, 132 Unchecked, 0.2s Time] [2022-03-01 17:30:01,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-03-01 17:30:01,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 837. [2022-03-01 17:30:01,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.13755980861244) internal successors, (2623), 836 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:01,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2623 transitions. [2022-03-01 17:30:01,955 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2623 transitions. Word has length 24 [2022-03-01 17:30:01,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:01,955 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 2623 transitions. [2022-03-01 17:30:01,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:01,956 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2623 transitions. [2022-03-01 17:30:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:01,957 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:01,957 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:01,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-01 17:30:02,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2022-03-01 17:30:02,158 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:02,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:02,158 INFO L85 PathProgramCache]: Analyzing trace with hash -368448059, now seen corresponding path program 59 times [2022-03-01 17:30:02,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:02,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284152487] [2022-03-01 17:30:02,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:02,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:02,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:02,369 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:02,369 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284152487] [2022-03-01 17:30:02,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284152487] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:02,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463164896] [2022-03-01 17:30:02,370 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:30:02,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:02,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:02,371 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:02,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 17:30:02,405 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:30:02,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:02,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:02,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:02,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:02,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:30:02,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:02,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:30:02,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:02,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:30:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:02,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:03,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:03,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 71 [2022-03-01 17:30:03,449 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:03,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:30:03,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:03,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:30:03,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:03,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463164896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:03,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:03,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:30:03,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899340934] [2022-03-01 17:30:03,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:03,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:03,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:03,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:03,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:03,477 INFO L87 Difference]: Start difference. First operand 837 states and 2623 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:03,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:03,812 INFO L93 Difference]: Finished difference Result 949 states and 2914 transitions. [2022-03-01 17:30:03,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:30:03,812 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:03,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:03,814 INFO L225 Difference]: With dead ends: 949 [2022-03-01 17:30:03,814 INFO L226 Difference]: Without dead ends: 919 [2022-03-01 17:30:03,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=762, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:30:03,814 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 66 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 375 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:03,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 285 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 463 Invalid, 0 Unknown, 375 Unchecked, 0.2s Time] [2022-03-01 17:30:03,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-03-01 17:30:03,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 808. [2022-03-01 17:30:03,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 807 states have (on average 3.1449814126394053) internal successors, (2538), 807 states have internal predecessors, (2538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:03,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 2538 transitions. [2022-03-01 17:30:03,825 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 2538 transitions. Word has length 24 [2022-03-01 17:30:03,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:03,825 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 2538 transitions. [2022-03-01 17:30:03,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:03,825 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 2538 transitions. [2022-03-01 17:30:03,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:03,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:03,826 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:03,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-01 17:30:04,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-01 17:30:04,027 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:04,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:04,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1380524797, now seen corresponding path program 60 times [2022-03-01 17:30:04,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:04,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322536332] [2022-03-01 17:30:04,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:04,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:04,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:04,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:04,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322536332] [2022-03-01 17:30:04,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322536332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:04,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733179940] [2022-03-01 17:30:04,190 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:30:04,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:04,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:04,192 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:04,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 17:30:04,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:30:04,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:04,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:04,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:04,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:04,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:30:04,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:04,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:30:04,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:04,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:30:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:04,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:05,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:05,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:30:05,254 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:05,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:30:05,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:05,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:30:05,280 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:05,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733179940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:05,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:05,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:30:05,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017442589] [2022-03-01 17:30:05,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:05,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:05,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:05,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:05,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:05,281 INFO L87 Difference]: Start difference. First operand 808 states and 2538 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:05,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:05,534 INFO L93 Difference]: Finished difference Result 902 states and 2789 transitions. [2022-03-01 17:30:05,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:30:05,534 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:05,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:05,536 INFO L225 Difference]: With dead ends: 902 [2022-03-01 17:30:05,536 INFO L226 Difference]: Without dead ends: 871 [2022-03-01 17:30:05,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:30:05,536 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:05,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 207 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 321 Invalid, 0 Unknown, 153 Unchecked, 0.1s Time] [2022-03-01 17:30:05,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-03-01 17:30:05,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 792. [2022-03-01 17:30:05,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.142857142857143) internal successors, (2486), 791 states have internal predecessors, (2486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:05,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2486 transitions. [2022-03-01 17:30:05,549 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2486 transitions. Word has length 24 [2022-03-01 17:30:05,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:05,549 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 2486 transitions. [2022-03-01 17:30:05,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:05,549 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2486 transitions. [2022-03-01 17:30:05,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:05,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:05,551 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:05,575 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-03-01 17:30:05,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:05,774 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:05,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:05,774 INFO L85 PathProgramCache]: Analyzing trace with hash 61894819, now seen corresponding path program 61 times [2022-03-01 17:30:05,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:05,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106581239] [2022-03-01 17:30:05,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:05,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:05,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:05,930 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:05,931 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:05,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106581239] [2022-03-01 17:30:05,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106581239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:05,931 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803442658] [2022-03-01 17:30:05,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:30:05,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:05,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:05,932 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:05,933 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 17:30:05,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:05,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:30:05,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:06,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-03-01 17:30:06,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:30:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:06,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:06,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:06,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 57 [2022-03-01 17:30:06,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:06,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 103 [2022-03-01 17:30:06,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:06,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 81 [2022-03-01 17:30:06,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:06,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803442658] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:06,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:06,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:30:06,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259330344] [2022-03-01 17:30:06,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:06,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:30:06,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:06,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:30:06,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:30:06,894 INFO L87 Difference]: Start difference. First operand 792 states and 2486 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:07,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:07,322 INFO L93 Difference]: Finished difference Result 955 states and 2922 transitions. [2022-03-01 17:30:07,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:30:07,322 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:07,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:07,324 INFO L225 Difference]: With dead ends: 955 [2022-03-01 17:30:07,324 INFO L226 Difference]: Without dead ends: 865 [2022-03-01 17:30:07,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:30:07,324 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:07,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 188 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:30:07,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-03-01 17:30:07,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 799. [2022-03-01 17:30:07,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.1416040100250626) internal successors, (2507), 798 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:07,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2507 transitions. [2022-03-01 17:30:07,334 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2507 transitions. Word has length 24 [2022-03-01 17:30:07,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:07,334 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 2507 transitions. [2022-03-01 17:30:07,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 21 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:07,334 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2507 transitions. [2022-03-01 17:30:07,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:07,335 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:07,335 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:07,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-03-01 17:30:07,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:07,536 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:07,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:07,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1225827993, now seen corresponding path program 62 times [2022-03-01 17:30:07,536 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:07,536 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306308183] [2022-03-01 17:30:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:07,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:07,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:07,742 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:07,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306308183] [2022-03-01 17:30:07,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306308183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:07,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127343575] [2022-03-01 17:30:07,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:30:07,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:07,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:07,744 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:07,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-01 17:30:07,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:30:07,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:07,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:07,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:07,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:07,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:30:08,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:08,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:30:08,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:08,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:30:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:08,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:08,679 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:08,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 57 [2022-03-01 17:30:08,890 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:08,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2022-03-01 17:30:08,895 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:08,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 60 [2022-03-01 17:30:09,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:09,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127343575] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:09,017 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:09,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:30:09,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494565018] [2022-03-01 17:30:09,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:09,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:09,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:09,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:09,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:09,019 INFO L87 Difference]: Start difference. First operand 799 states and 2507 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:09,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:09,836 INFO L93 Difference]: Finished difference Result 1097 states and 3218 transitions. [2022-03-01 17:30:09,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:30:09,837 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:09,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:09,838 INFO L225 Difference]: With dead ends: 1097 [2022-03-01 17:30:09,838 INFO L226 Difference]: Without dead ends: 986 [2022-03-01 17:30:09,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:30:09,839 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 104 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:09,839 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 341 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 905 Invalid, 0 Unknown, 204 Unchecked, 0.4s Time] [2022-03-01 17:30:09,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2022-03-01 17:30:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 799. [2022-03-01 17:30:09,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 3.1416040100250626) internal successors, (2507), 798 states have internal predecessors, (2507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:09,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 2507 transitions. [2022-03-01 17:30:09,849 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 2507 transitions. Word has length 24 [2022-03-01 17:30:09,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:09,849 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 2507 transitions. [2022-03-01 17:30:09,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:09,849 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 2507 transitions. [2022-03-01 17:30:09,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:09,850 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:09,851 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:09,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-03-01 17:30:10,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-01 17:30:10,051 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:10,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:10,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1593521725, now seen corresponding path program 63 times [2022-03-01 17:30:10,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:10,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648053868] [2022-03-01 17:30:10,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:10,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:10,263 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:10,263 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:10,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648053868] [2022-03-01 17:30:10,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648053868] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:10,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298738795] [2022-03-01 17:30:10,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:30:10,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:10,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:10,264 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:10,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-01 17:30:10,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:30:10,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:10,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:30:10,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:10,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:10,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:30:10,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:10,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-01 17:30:10,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:10,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:30:10,687 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:10,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:11,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:11,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-03-01 17:30:11,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:11,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 105 [2022-03-01 17:30:11,427 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:11,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 83 [2022-03-01 17:30:11,524 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:11,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298738795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:11,524 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:11,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:30:11,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033231775] [2022-03-01 17:30:11,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:11,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:30:11,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:11,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:30:11,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:30:11,525 INFO L87 Difference]: Start difference. First operand 799 states and 2507 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:11,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:11,825 INFO L93 Difference]: Finished difference Result 1018 states and 3086 transitions. [2022-03-01 17:30:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:30:11,825 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:11,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:11,827 INFO L225 Difference]: With dead ends: 1018 [2022-03-01 17:30:11,827 INFO L226 Difference]: Without dead ends: 938 [2022-03-01 17:30:11,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:11,827 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 56 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:11,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 227 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 536 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-03-01 17:30:11,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-03-01 17:30:11,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 805. [2022-03-01 17:30:11,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.1417910447761193) internal successors, (2526), 804 states have internal predecessors, (2526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:11,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2526 transitions. [2022-03-01 17:30:11,837 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2526 transitions. Word has length 24 [2022-03-01 17:30:11,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:11,838 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 2526 transitions. [2022-03-01 17:30:11,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:11,838 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2526 transitions. [2022-03-01 17:30:11,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:11,839 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:11,839 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:11,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-01 17:30:12,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-01 17:30:12,040 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:12,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:12,040 INFO L85 PathProgramCache]: Analyzing trace with hash 688380835, now seen corresponding path program 64 times [2022-03-01 17:30:12,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:12,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875113653] [2022-03-01 17:30:12,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:12,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:12,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:12,224 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:12,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875113653] [2022-03-01 17:30:12,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875113653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:12,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309779629] [2022-03-01 17:30:12,225 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:30:12,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:12,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:12,226 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:12,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-01 17:30:12,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:30:12,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:12,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:30:12,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:12,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:12,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:30:12,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:12,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-01 17:30:12,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:12,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-03-01 17:30:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:12,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:12,933 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:12,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-03-01 17:30:13,182 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:13,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 105 [2022-03-01 17:30:13,188 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:13,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 83 [2022-03-01 17:30:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:13,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309779629] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:13,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:13,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:30:13,307 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823810466] [2022-03-01 17:30:13,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:13,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:13,307 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:13,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:13,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:13,307 INFO L87 Difference]: Start difference. First operand 805 states and 2526 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:13,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:13,407 INFO L93 Difference]: Finished difference Result 897 states and 2769 transitions. [2022-03-01 17:30:13,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:30:13,408 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:13,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:13,409 INFO L225 Difference]: With dead ends: 897 [2022-03-01 17:30:13,409 INFO L226 Difference]: Without dead ends: 858 [2022-03-01 17:30:13,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:13,409 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 158 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:13,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 291 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 215 Invalid, 0 Unknown, 158 Unchecked, 0.1s Time] [2022-03-01 17:30:13,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2022-03-01 17:30:13,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 805. [2022-03-01 17:30:13,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 805 states, 804 states have (on average 3.1393034825870645) internal successors, (2524), 804 states have internal predecessors, (2524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:13,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 805 states to 805 states and 2524 transitions. [2022-03-01 17:30:13,422 INFO L78 Accepts]: Start accepts. Automaton has 805 states and 2524 transitions. Word has length 24 [2022-03-01 17:30:13,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:13,422 INFO L470 AbstractCegarLoop]: Abstraction has 805 states and 2524 transitions. [2022-03-01 17:30:13,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand 805 states and 2524 transitions. [2022-03-01 17:30:13,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:13,424 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:13,424 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:13,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-01 17:30:13,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:13,627 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:13,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:13,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1037036391, now seen corresponding path program 65 times [2022-03-01 17:30:13,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:13,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165719920] [2022-03-01 17:30:13,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:13,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:13,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:13,847 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:13,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165719920] [2022-03-01 17:30:13,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165719920] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:13,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837703654] [2022-03-01 17:30:13,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:30:13,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:13,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:13,852 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:13,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-01 17:30:13,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:30:13,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:13,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:13,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:13,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:30:14,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:14,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:30:14,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:14,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:30:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:14,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:14,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:14,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2022-03-01 17:30:14,912 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:14,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 77 [2022-03-01 17:30:14,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:14,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 59 [2022-03-01 17:30:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:15,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837703654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:15,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:15,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:30:15,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168518172] [2022-03-01 17:30:15,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:15,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:30:15,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:15,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:30:15,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:30:15,053 INFO L87 Difference]: Start difference. First operand 805 states and 2524 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:15,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:15,430 INFO L93 Difference]: Finished difference Result 902 states and 2793 transitions. [2022-03-01 17:30:15,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:30:15,431 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:15,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:15,432 INFO L225 Difference]: With dead ends: 902 [2022-03-01 17:30:15,432 INFO L226 Difference]: Without dead ends: 843 [2022-03-01 17:30:15,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=709, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:30:15,433 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:15,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 217 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 540 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-03-01 17:30:15,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-03-01 17:30:15,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 806. [2022-03-01 17:30:15,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1403726708074533) internal successors, (2528), 805 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2528 transitions. [2022-03-01 17:30:15,442 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2528 transitions. Word has length 24 [2022-03-01 17:30:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:15,442 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 2528 transitions. [2022-03-01 17:30:15,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2528 transitions. [2022-03-01 17:30:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:15,443 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:15,443 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:15,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-01 17:30:15,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:15,644 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash -2093997731, now seen corresponding path program 66 times [2022-03-01 17:30:15,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:15,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255785226] [2022-03-01 17:30:15,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:15,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:15,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:15,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255785226] [2022-03-01 17:30:15,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255785226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:15,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77276869] [2022-03-01 17:30:15,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:30:15,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:15,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:15,830 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:15,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-01 17:30:15,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:30:15,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:15,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:15,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:15,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:30:15,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:30:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:16,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:16,714 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:16,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 72 [2022-03-01 17:30:16,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:16,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 78 [2022-03-01 17:30:16,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:16,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 60 [2022-03-01 17:30:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:16,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77276869] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:16,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:16,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:30:16,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211016787] [2022-03-01 17:30:16,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:16,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:30:16,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:16,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:30:16,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:30:16,938 INFO L87 Difference]: Start difference. First operand 806 states and 2528 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:17,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:17,305 INFO L93 Difference]: Finished difference Result 1128 states and 3413 transitions. [2022-03-01 17:30:17,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:30:17,306 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:17,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:17,307 INFO L225 Difference]: With dead ends: 1128 [2022-03-01 17:30:17,307 INFO L226 Difference]: Without dead ends: 1035 [2022-03-01 17:30:17,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:30:17,308 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:17,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 237 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:30:17,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1035 states. [2022-03-01 17:30:17,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1035 to 806. [2022-03-01 17:30:17,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 806 states, 805 states have (on average 3.1403726708074533) internal successors, (2528), 805 states have internal predecessors, (2528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:17,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 2528 transitions. [2022-03-01 17:30:17,320 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 2528 transitions. Word has length 24 [2022-03-01 17:30:17,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:17,320 INFO L470 AbstractCegarLoop]: Abstraction has 806 states and 2528 transitions. [2022-03-01 17:30:17,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:17,320 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 2528 transitions. [2022-03-01 17:30:17,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:17,322 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:17,322 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:17,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-01 17:30:17,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:17,523 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:17,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:17,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1345587235, now seen corresponding path program 67 times [2022-03-01 17:30:17,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:17,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275778098] [2022-03-01 17:30:17,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:17,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:17,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:17,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275778098] [2022-03-01 17:30:17,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275778098] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:17,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209638452] [2022-03-01 17:30:17,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:30:17,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:17,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:17,762 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:17,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-01 17:30:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:17,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:30:17,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:17,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:17,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:30:18,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:18,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:30:18,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:18,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-03-01 17:30:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:18,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:18,900 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:18,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 74 [2022-03-01 17:30:19,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:19,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 100 [2022-03-01 17:30:19,028 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:19,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 78 [2022-03-01 17:30:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:19,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209638452] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:19,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:19,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:30:19,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321862886] [2022-03-01 17:30:19,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:19,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:19,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:19,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:19,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:19,128 INFO L87 Difference]: Start difference. First operand 806 states and 2528 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:19,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:19,413 INFO L93 Difference]: Finished difference Result 910 states and 2803 transitions. [2022-03-01 17:30:19,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:30:19,413 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:19,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:19,415 INFO L225 Difference]: With dead ends: 910 [2022-03-01 17:30:19,415 INFO L226 Difference]: Without dead ends: 839 [2022-03-01 17:30:19,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:30:19,415 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:19,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 199 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 523 Invalid, 0 Unknown, 269 Unchecked, 0.2s Time] [2022-03-01 17:30:19,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2022-03-01 17:30:19,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 813. [2022-03-01 17:30:19,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.1391625615763545) internal successors, (2549), 812 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:19,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2549 transitions. [2022-03-01 17:30:19,424 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2549 transitions. Word has length 24 [2022-03-01 17:30:19,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:19,424 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 2549 transitions. [2022-03-01 17:30:19,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:19,425 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2549 transitions. [2022-03-01 17:30:19,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:19,426 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:19,426 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:19,442 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-03-01 17:30:19,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:19,626 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:19,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:19,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1126356007, now seen corresponding path program 68 times [2022-03-01 17:30:19,627 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:19,627 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206093846] [2022-03-01 17:30:19,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:19,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:19,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:19,850 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:19,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:19,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206093846] [2022-03-01 17:30:19,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206093846] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:19,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955098806] [2022-03-01 17:30:19,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:30:19,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:19,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:19,856 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:19,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-01 17:30:19,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:30:19,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:19,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:19,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:19,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:30:20,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:30:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:20,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:20,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:20,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 74 [2022-03-01 17:30:20,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:20,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 80 [2022-03-01 17:30:20,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:20,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 62 [2022-03-01 17:30:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:20,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955098806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:20,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:20,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:30:20,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212857757] [2022-03-01 17:30:20,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:20,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:30:20,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:20,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:30:20,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:30:20,930 INFO L87 Difference]: Start difference. First operand 813 states and 2549 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:21,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:21,364 INFO L93 Difference]: Finished difference Result 888 states and 2763 transitions. [2022-03-01 17:30:21,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:30:21,364 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:21,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:21,365 INFO L225 Difference]: With dead ends: 888 [2022-03-01 17:30:21,365 INFO L226 Difference]: Without dead ends: 857 [2022-03-01 17:30:21,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=656, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:30:21,366 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 54 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:21,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 198 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:30:21,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-03-01 17:30:21,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 813. [2022-03-01 17:30:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 813 states, 812 states have (on average 3.1391625615763545) internal successors, (2549), 812 states have internal predecessors, (2549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:21,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 813 states to 813 states and 2549 transitions. [2022-03-01 17:30:21,375 INFO L78 Accepts]: Start accepts. Automaton has 813 states and 2549 transitions. Word has length 24 [2022-03-01 17:30:21,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:21,375 INFO L470 AbstractCegarLoop]: Abstraction has 813 states and 2549 transitions. [2022-03-01 17:30:21,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:21,375 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states and 2549 transitions. [2022-03-01 17:30:21,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:21,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:21,376 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:21,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-01 17:30:21,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2022-03-01 17:30:21,577 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:21,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:21,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1810324647, now seen corresponding path program 69 times [2022-03-01 17:30:21,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:21,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571557095] [2022-03-01 17:30:21,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:21,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:21,776 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:21,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:21,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571557095] [2022-03-01 17:30:21,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571557095] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:21,777 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73578309] [2022-03-01 17:30:21,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:30:21,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:21,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:21,778 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:21,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-01 17:30:21,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:30:21,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:21,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:21,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:21,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:21,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:30:21,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:21,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:30:22,002 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:22,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:30:22,247 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:22,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:22,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:22,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 74 [2022-03-01 17:30:22,985 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:22,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 75 [2022-03-01 17:30:22,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:22,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 57 [2022-03-01 17:30:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:23,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73578309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:23,104 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:23,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:30:23,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907083044] [2022-03-01 17:30:23,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:23,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:30:23,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:23,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:30:23,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:30:23,105 INFO L87 Difference]: Start difference. First operand 813 states and 2549 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:24,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:24,542 INFO L93 Difference]: Finished difference Result 1194 states and 3458 transitions. [2022-03-01 17:30:24,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:30:24,542 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:24,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:24,544 INFO L225 Difference]: With dead ends: 1194 [2022-03-01 17:30:24,544 INFO L226 Difference]: Without dead ends: 1044 [2022-03-01 17:30:24,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=188, Invalid=1218, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:30:24,544 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 166 mSDsluCounter, 475 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:24,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 280 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 923 Invalid, 0 Unknown, 24 Unchecked, 0.4s Time] [2022-03-01 17:30:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2022-03-01 17:30:24,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 834. [2022-03-01 17:30:24,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 3.146458583433373) internal successors, (2621), 833 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 2621 transitions. [2022-03-01 17:30:24,555 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 2621 transitions. Word has length 24 [2022-03-01 17:30:24,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:24,555 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 2621 transitions. [2022-03-01 17:30:24,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 2621 transitions. [2022-03-01 17:30:24,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:24,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:24,557 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:24,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-03-01 17:30:24,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:24,758 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:24,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:24,758 INFO L85 PathProgramCache]: Analyzing trace with hash 613904985, now seen corresponding path program 70 times [2022-03-01 17:30:24,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:24,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344612424] [2022-03-01 17:30:24,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:24,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:24,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:30:25,026 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:25,026 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344612424] [2022-03-01 17:30:25,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344612424] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:25,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553795665] [2022-03-01 17:30:25,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:30:25,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:25,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:25,028 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:25,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-01 17:30:25,056 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:30:25,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:25,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:30:25,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:25,153 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:25,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:30:25,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:25,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:30:25,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:25,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:30:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:30:25,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:26,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:26,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 67 [2022-03-01 17:30:26,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:26,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 93 [2022-03-01 17:30:26,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:26,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 73 [2022-03-01 17:30:26,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:30:26,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553795665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:26,487 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:26,487 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:30:26,488 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810724724] [2022-03-01 17:30:26,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:26,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:26,488 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:26,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:26,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:26,488 INFO L87 Difference]: Start difference. First operand 834 states and 2621 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:28,210 INFO L93 Difference]: Finished difference Result 1545 states and 4458 transitions. [2022-03-01 17:30:28,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:30:28,210 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:28,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:28,212 INFO L225 Difference]: With dead ends: 1545 [2022-03-01 17:30:28,212 INFO L226 Difference]: Without dead ends: 1365 [2022-03-01 17:30:28,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=195, Invalid=1065, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:30:28,213 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 199 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 200 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:28,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 317 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 837 Invalid, 0 Unknown, 200 Unchecked, 0.4s Time] [2022-03-01 17:30:28,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2022-03-01 17:30:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 815. [2022-03-01 17:30:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 815 states, 814 states have (on average 3.1437346437346436) internal successors, (2559), 814 states have internal predecessors, (2559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:28,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 815 states to 815 states and 2559 transitions. [2022-03-01 17:30:28,226 INFO L78 Accepts]: Start accepts. Automaton has 815 states and 2559 transitions. Word has length 24 [2022-03-01 17:30:28,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:28,226 INFO L470 AbstractCegarLoop]: Abstraction has 815 states and 2559 transitions. [2022-03-01 17:30:28,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:28,226 INFO L276 IsEmpty]: Start isEmpty. Operand 815 states and 2559 transitions. [2022-03-01 17:30:28,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:28,228 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:28,228 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:28,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-03-01 17:30:28,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:28,428 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:28,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:28,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1389590713, now seen corresponding path program 71 times [2022-03-01 17:30:28,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:28,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414882994] [2022-03-01 17:30:28,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:28,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:28,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:28,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:28,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414882994] [2022-03-01 17:30:28,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414882994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:28,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309708331] [2022-03-01 17:30:28,683 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:30:28,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:28,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:28,684 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:28,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-01 17:30:28,712 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:30:28,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:28,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:28,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:28,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:28,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:30:28,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:28,927 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-03-01 17:30:28,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:28,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:30:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:29,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:29,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:29,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-01 17:30:29,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:29,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 124 [2022-03-01 17:30:29,849 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:29,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 96 [2022-03-01 17:30:29,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:29,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309708331] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:29,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:29,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:30:29,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997719043] [2022-03-01 17:30:29,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:29,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:29,971 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:29,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:29,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:29,971 INFO L87 Difference]: Start difference. First operand 815 states and 2559 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:30,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:30,355 INFO L93 Difference]: Finished difference Result 925 states and 2887 transitions. [2022-03-01 17:30:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:30:30,355 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:30,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:30,357 INFO L225 Difference]: With dead ends: 925 [2022-03-01 17:30:30,357 INFO L226 Difference]: Without dead ends: 890 [2022-03-01 17:30:30,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:30:30,357 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 42 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:30,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 240 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 642 Invalid, 0 Unknown, 197 Unchecked, 0.3s Time] [2022-03-01 17:30:30,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2022-03-01 17:30:30,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 818. [2022-03-01 17:30:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 818 states, 817 states have (on average 3.1468788249694004) internal successors, (2571), 817 states have internal predecessors, (2571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:30,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 818 states to 818 states and 2571 transitions. [2022-03-01 17:30:30,367 INFO L78 Accepts]: Start accepts. Automaton has 818 states and 2571 transitions. Word has length 24 [2022-03-01 17:30:30,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:30,367 INFO L470 AbstractCegarLoop]: Abstraction has 818 states and 2571 transitions. [2022-03-01 17:30:30,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:30,367 INFO L276 IsEmpty]: Start isEmpty. Operand 818 states and 2571 transitions. [2022-03-01 17:30:30,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:30,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:30,368 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:30,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-03-01 17:30:30,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:30,569 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:30,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:30,569 INFO L85 PathProgramCache]: Analyzing trace with hash 892311847, now seen corresponding path program 72 times [2022-03-01 17:30:30,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:30,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494851423] [2022-03-01 17:30:30,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:30,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:30,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:30,786 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:30,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:30,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494851423] [2022-03-01 17:30:30,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494851423] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:30,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034732032] [2022-03-01 17:30:30,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:30:30,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:30,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:30,788 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:30,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-01 17:30:30,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:30:30,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:30,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:30,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:30,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:30,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:30:31,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:31,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-01 17:30:31,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:31,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-03-01 17:30:31,152 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:31,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:31,673 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:31,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 121 [2022-03-01 17:30:31,987 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:31,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 73 [2022-03-01 17:30:31,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:31,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-03-01 17:30:32,103 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:32,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034732032] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:32,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:32,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:30:32,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660761268] [2022-03-01 17:30:32,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:32,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:32,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:32,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:32,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:32,104 INFO L87 Difference]: Start difference. First operand 818 states and 2571 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:32,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:32,466 INFO L93 Difference]: Finished difference Result 923 states and 2873 transitions. [2022-03-01 17:30:32,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:30:32,466 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:32,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:32,467 INFO L225 Difference]: With dead ends: 923 [2022-03-01 17:30:32,467 INFO L226 Difference]: Without dead ends: 884 [2022-03-01 17:30:32,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:30:32,468 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 46 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:32,468 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 217 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 427 Invalid, 0 Unknown, 300 Unchecked, 0.2s Time] [2022-03-01 17:30:32,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-03-01 17:30:32,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 819. [2022-03-01 17:30:32,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 818 states have (on average 3.1466992665036675) internal successors, (2574), 818 states have internal predecessors, (2574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:32,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 2574 transitions. [2022-03-01 17:30:32,481 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 2574 transitions. Word has length 24 [2022-03-01 17:30:32,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:32,481 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 2574 transitions. [2022-03-01 17:30:32,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:32,482 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 2574 transitions. [2022-03-01 17:30:32,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:32,483 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:32,483 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:32,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-01 17:30:32,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-01 17:30:32,703 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:32,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:32,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1081039869, now seen corresponding path program 73 times [2022-03-01 17:30:32,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:32,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238303009] [2022-03-01 17:30:32,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:32,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:32,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:32,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238303009] [2022-03-01 17:30:32,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238303009] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:32,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566565841] [2022-03-01 17:30:32,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:30:32,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:32,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:32,969 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:32,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-01 17:30:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:32,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:32,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:33,096 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:33,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:30:33,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:33,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-01 17:30:33,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:33,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:30:33,325 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:33,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:33,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:33,865 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 95 [2022-03-01 17:30:34,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:34,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 124 [2022-03-01 17:30:34,073 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:34,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 96 [2022-03-01 17:30:34,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:34,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566565841] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:34,175 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:34,175 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:30:34,175 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478148760] [2022-03-01 17:30:34,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:34,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:30:34,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:34,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:30:34,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:30:34,176 INFO L87 Difference]: Start difference. First operand 819 states and 2574 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:35,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:35,081 INFO L93 Difference]: Finished difference Result 1012 states and 3066 transitions. [2022-03-01 17:30:35,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:30:35,082 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:35,083 INFO L225 Difference]: With dead ends: 1012 [2022-03-01 17:30:35,083 INFO L226 Difference]: Without dead ends: 911 [2022-03-01 17:30:35,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:30:35,084 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 133 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:35,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 208 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 676 Invalid, 0 Unknown, 129 Unchecked, 0.3s Time] [2022-03-01 17:30:35,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-03-01 17:30:35,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 840. [2022-03-01 17:30:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.1537544696066746) internal successors, (2646), 839 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:35,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2646 transitions. [2022-03-01 17:30:35,095 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2646 transitions. Word has length 24 [2022-03-01 17:30:35,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:35,095 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 2646 transitions. [2022-03-01 17:30:35,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:35,095 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2646 transitions. [2022-03-01 17:30:35,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:35,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:35,096 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:35,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-03-01 17:30:35,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:35,299 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:35,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:35,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1343189763, now seen corresponding path program 74 times [2022-03-01 17:30:35,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:35,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314092937] [2022-03-01 17:30:35,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:35,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:30:35,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:35,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314092937] [2022-03-01 17:30:35,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314092937] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:35,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605863403] [2022-03-01 17:30:35,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:30:35,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:35,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:35,559 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:35,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-01 17:30:35,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:30:35,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:35,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:35,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:35,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:35,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:30:35,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:35,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-01 17:30:35,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:35,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:30:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:30:35,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:36,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:36,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 131 treesize of output 121 [2022-03-01 17:30:36,856 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:36,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 76 [2022-03-01 17:30:36,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:36,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 58 [2022-03-01 17:30:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:30:37,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605863403] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:37,014 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:37,015 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:30:37,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609252328] [2022-03-01 17:30:37,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:37,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:37,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:37,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:37,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:37,016 INFO L87 Difference]: Start difference. First operand 840 states and 2646 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:37,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:37,530 INFO L93 Difference]: Finished difference Result 920 states and 2836 transitions. [2022-03-01 17:30:37,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:30:37,530 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:37,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:37,531 INFO L225 Difference]: With dead ends: 920 [2022-03-01 17:30:37,531 INFO L226 Difference]: Without dead ends: 879 [2022-03-01 17:30:37,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:30:37,532 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 67 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 183 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:37,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 216 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 759 Invalid, 0 Unknown, 183 Unchecked, 0.3s Time] [2022-03-01 17:30:37,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2022-03-01 17:30:37,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 820. [2022-03-01 17:30:37,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.148962148962149) internal successors, (2579), 819 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:37,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2579 transitions. [2022-03-01 17:30:37,541 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2579 transitions. Word has length 24 [2022-03-01 17:30:37,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:37,541 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 2579 transitions. [2022-03-01 17:30:37,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:37,541 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2579 transitions. [2022-03-01 17:30:37,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:37,542 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:37,542 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:37,558 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-03-01 17:30:37,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:37,743 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:37,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:37,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1180960483, now seen corresponding path program 75 times [2022-03-01 17:30:37,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:37,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763811075] [2022-03-01 17:30:37,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:37,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:37,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:38,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:38,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:38,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763811075] [2022-03-01 17:30:38,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763811075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:38,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239088806] [2022-03-01 17:30:38,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:30:38,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:38,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:38,012 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:38,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-01 17:30:38,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:30:38,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:38,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:38,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:38,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:38,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:30:38,268 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:38,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-03-01 17:30:38,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:38,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-03-01 17:30:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:38,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:38,846 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:38,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 119 [2022-03-01 17:30:39,008 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:39,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-03-01 17:30:39,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:39,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 57 [2022-03-01 17:30:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:39,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239088806] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:39,132 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:39,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:30:39,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785903889] [2022-03-01 17:30:39,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:39,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:39,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:39,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:39,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:39,132 INFO L87 Difference]: Start difference. First operand 820 states and 2579 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:39,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:39,539 INFO L93 Difference]: Finished difference Result 923 states and 2862 transitions. [2022-03-01 17:30:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:30:39,539 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:39,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:39,540 INFO L225 Difference]: With dead ends: 923 [2022-03-01 17:30:39,540 INFO L226 Difference]: Without dead ends: 884 [2022-03-01 17:30:39,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:30:39,541 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 35 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:39,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 255 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 482 Invalid, 0 Unknown, 231 Unchecked, 0.2s Time] [2022-03-01 17:30:39,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2022-03-01 17:30:39,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 822. [2022-03-01 17:30:39,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 3.1473812423873326) internal successors, (2584), 821 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:39,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 2584 transitions. [2022-03-01 17:30:39,550 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 2584 transitions. Word has length 24 [2022-03-01 17:30:39,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:39,550 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 2584 transitions. [2022-03-01 17:30:39,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:39,550 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 2584 transitions. [2022-03-01 17:30:39,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:39,552 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:39,552 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:39,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-01 17:30:39,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:39,752 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:39,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:39,752 INFO L85 PathProgramCache]: Analyzing trace with hash 82535079, now seen corresponding path program 76 times [2022-03-01 17:30:39,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:39,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224638343] [2022-03-01 17:30:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:39,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:39,975 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:39,975 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224638343] [2022-03-01 17:30:39,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224638343] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:39,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886501508] [2022-03-01 17:30:39,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:30:39,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:39,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:39,977 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:39,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-01 17:30:40,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:30:40,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:40,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:40,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:40,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:40,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:30:40,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:40,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:30:40,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:40,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:30:40,333 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:40,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:40,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:40,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 97 [2022-03-01 17:30:41,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:41,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 126 [2022-03-01 17:30:41,043 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:41,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 98 [2022-03-01 17:30:41,205 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:41,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886501508] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:41,206 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:41,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:30:41,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212731338] [2022-03-01 17:30:41,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:41,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:41,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:41,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:41,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:41,206 INFO L87 Difference]: Start difference. First operand 822 states and 2584 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:41,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:41,992 INFO L93 Difference]: Finished difference Result 961 states and 2905 transitions. [2022-03-01 17:30:41,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:30:41,992 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:41,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:41,994 INFO L225 Difference]: With dead ends: 961 [2022-03-01 17:30:41,994 INFO L226 Difference]: Without dead ends: 887 [2022-03-01 17:30:41,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=149, Invalid=907, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:30:41,995 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 101 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:41,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 233 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 702 Invalid, 0 Unknown, 190 Unchecked, 0.3s Time] [2022-03-01 17:30:41,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 887 states. [2022-03-01 17:30:42,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 887 to 836. [2022-03-01 17:30:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.138922155688623) internal successors, (2621), 835 states have internal predecessors, (2621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2621 transitions. [2022-03-01 17:30:42,005 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2621 transitions. Word has length 24 [2022-03-01 17:30:42,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:42,005 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 2621 transitions. [2022-03-01 17:30:42,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:42,005 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2621 transitions. [2022-03-01 17:30:42,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:42,007 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:42,007 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:42,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-01 17:30:42,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:42,207 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:42,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:42,208 INFO L85 PathProgramCache]: Analyzing trace with hash 299283367, now seen corresponding path program 77 times [2022-03-01 17:30:42,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:42,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364815174] [2022-03-01 17:30:42,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:42,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:42,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:30:42,380 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:42,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364815174] [2022-03-01 17:30:42,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364815174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:42,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155831194] [2022-03-01 17:30:42,380 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:30:42,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:42,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:42,381 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:42,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-01 17:30:42,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:30:42,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:42,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:42,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:42,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:42,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:30:42,573 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:42,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-01 17:30:42,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:42,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-03-01 17:30:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:30:42,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:43,170 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:43,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 119 [2022-03-01 17:30:43,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:43,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 77 [2022-03-01 17:30:43,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:43,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 61 [2022-03-01 17:30:43,490 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:30:43,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155831194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:43,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:43,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:30:43,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907374418] [2022-03-01 17:30:43,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:43,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:43,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:43,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:43,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:43,491 INFO L87 Difference]: Start difference. First operand 836 states and 2621 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:43,710 INFO L93 Difference]: Finished difference Result 885 states and 2747 transitions. [2022-03-01 17:30:43,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:30:43,710 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:43,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:43,711 INFO L225 Difference]: With dead ends: 885 [2022-03-01 17:30:43,712 INFO L226 Difference]: Without dead ends: 866 [2022-03-01 17:30:43,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:43,712 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:43,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 165 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 488 Invalid, 0 Unknown, 146 Unchecked, 0.2s Time] [2022-03-01 17:30:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-03-01 17:30:43,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 820. [2022-03-01 17:30:43,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 820 states, 819 states have (on average 3.148962148962149) internal successors, (2579), 819 states have internal predecessors, (2579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:43,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 820 states to 820 states and 2579 transitions. [2022-03-01 17:30:43,721 INFO L78 Accepts]: Start accepts. Automaton has 820 states and 2579 transitions. Word has length 24 [2022-03-01 17:30:43,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:43,721 INFO L470 AbstractCegarLoop]: Abstraction has 820 states and 2579 transitions. [2022-03-01 17:30:43,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:43,722 INFO L276 IsEmpty]: Start isEmpty. Operand 820 states and 2579 transitions. [2022-03-01 17:30:43,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:43,723 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:43,723 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:43,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-01 17:30:43,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:43,923 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:43,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:43,924 INFO L85 PathProgramCache]: Analyzing trace with hash 715638361, now seen corresponding path program 78 times [2022-03-01 17:30:43,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:43,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126878120] [2022-03-01 17:30:43,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:43,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:44,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:44,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126878120] [2022-03-01 17:30:44,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126878120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:44,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713188173] [2022-03-01 17:30:44,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:30:44,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:44,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:44,084 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:44,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-01 17:30:44,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:30:44,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:44,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:44,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:44,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:30:44,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:30:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:44,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:44,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:44,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:30:45,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:45,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:30:45,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:45,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:30:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:45,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713188173] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:45,187 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:45,187 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:30:45,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696348449] [2022-03-01 17:30:45,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:45,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:30:45,187 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:45,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:30:45,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:30:45,188 INFO L87 Difference]: Start difference. First operand 820 states and 2579 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:45,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:45,779 INFO L93 Difference]: Finished difference Result 944 states and 2946 transitions. [2022-03-01 17:30:45,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:30:45,779 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:45,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:45,781 INFO L225 Difference]: With dead ends: 944 [2022-03-01 17:30:45,781 INFO L226 Difference]: Without dead ends: 913 [2022-03-01 17:30:45,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:30:45,781 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 66 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 845 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:45,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 220 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 845 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:30:45,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-03-01 17:30:45,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 825. [2022-03-01 17:30:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 3.1492718446601944) internal successors, (2595), 824 states have internal predecessors, (2595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:45,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2595 transitions. [2022-03-01 17:30:45,791 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2595 transitions. Word has length 24 [2022-03-01 17:30:45,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:45,791 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 2595 transitions. [2022-03-01 17:30:45,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2595 transitions. [2022-03-01 17:30:45,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:45,792 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:45,792 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:45,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-01 17:30:45,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:45,993 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:45,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:45,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1879571535, now seen corresponding path program 79 times [2022-03-01 17:30:45,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:45,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595484987] [2022-03-01 17:30:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:45,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:45,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:46,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:46,185 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:46,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595484987] [2022-03-01 17:30:46,185 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595484987] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:46,185 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853663577] [2022-03-01 17:30:46,185 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:30:46,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:46,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:46,186 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:46,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-01 17:30:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:46,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:46,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:46,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:30:46,521 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:46,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 52 [2022-03-01 17:30:46,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:46,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2022-03-01 17:30:46,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:46,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:47,207 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:47,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:30:47,342 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:47,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-01 17:30:47,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:47,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 17:30:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:47,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853663577] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:47,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:47,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:30:47,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245271532] [2022-03-01 17:30:47,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:47,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:30:47,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:47,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:30:47,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:30:47,400 INFO L87 Difference]: Start difference. First operand 825 states and 2595 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:47,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:47,859 INFO L93 Difference]: Finished difference Result 1001 states and 3108 transitions. [2022-03-01 17:30:47,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:30:47,859 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:47,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:47,861 INFO L225 Difference]: With dead ends: 1001 [2022-03-01 17:30:47,861 INFO L226 Difference]: Without dead ends: 954 [2022-03-01 17:30:47,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:47,861 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 83 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:47,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 239 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 663 Invalid, 0 Unknown, 93 Unchecked, 0.3s Time] [2022-03-01 17:30:47,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-03-01 17:30:47,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 838. [2022-03-01 17:30:47,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.154121863799283) internal successors, (2640), 837 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:47,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2640 transitions. [2022-03-01 17:30:47,872 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2640 transitions. Word has length 24 [2022-03-01 17:30:47,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:47,872 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 2640 transitions. [2022-03-01 17:30:47,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:47,872 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2640 transitions. [2022-03-01 17:30:47,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:47,873 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:47,873 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:47,889 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-03-01 17:30:48,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2022-03-01 17:30:48,074 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:48,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:48,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1046066827, now seen corresponding path program 80 times [2022-03-01 17:30:48,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:48,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676808277] [2022-03-01 17:30:48,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:48,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:48,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:48,270 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:48,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676808277] [2022-03-01 17:30:48,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676808277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:48,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24236960] [2022-03-01 17:30:48,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:30:48,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:48,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:48,272 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:48,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-01 17:30:48,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:30:48,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:48,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:48,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:48,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:30:48,515 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:48,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:30:48,518 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:48,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:30:48,645 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:48,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:49,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:49,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2022-03-01 17:30:49,335 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:49,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:30:49,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:49,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:30:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:49,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24236960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:49,388 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:49,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:30:49,388 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021114276] [2022-03-01 17:30:49,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:49,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:30:49,389 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:49,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:30:49,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:30:49,389 INFO L87 Difference]: Start difference. First operand 838 states and 2640 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:49,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:49,966 INFO L93 Difference]: Finished difference Result 989 states and 3064 transitions. [2022-03-01 17:30:49,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:30:49,966 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:49,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:49,968 INFO L225 Difference]: With dead ends: 989 [2022-03-01 17:30:49,968 INFO L226 Difference]: Without dead ends: 896 [2022-03-01 17:30:49,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:30:49,968 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 75 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 703 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:49,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 217 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 703 Invalid, 0 Unknown, 123 Unchecked, 0.3s Time] [2022-03-01 17:30:49,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-03-01 17:30:49,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 845. [2022-03-01 17:30:49,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.1528436018957344) internal successors, (2661), 844 states have internal predecessors, (2661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:49,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2661 transitions. [2022-03-01 17:30:49,978 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2661 transitions. Word has length 24 [2022-03-01 17:30:49,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:49,978 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2661 transitions. [2022-03-01 17:30:49,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:49,979 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2661 transitions. [2022-03-01 17:30:49,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:49,980 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:49,980 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:49,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-01 17:30:50,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:50,180 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:50,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:50,181 INFO L85 PathProgramCache]: Analyzing trace with hash 804957977, now seen corresponding path program 81 times [2022-03-01 17:30:50,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:50,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008367803] [2022-03-01 17:30:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:50,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:50,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:50,361 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:50,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:50,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008367803] [2022-03-01 17:30:50,361 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008367803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:50,361 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051698574] [2022-03-01 17:30:50,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:30:50,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:50,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:50,362 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:50,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-01 17:30:50,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:30:50,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:50,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:50,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:50,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:30:50,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:30:50,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:50,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:51,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:51,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-03-01 17:30:51,348 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:51,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:30:51,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:51,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:30:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:51,396 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051698574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:51,396 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:51,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:30:51,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791786662] [2022-03-01 17:30:51,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:51,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:30:51,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:51,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:30:51,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:30:51,397 INFO L87 Difference]: Start difference. First operand 845 states and 2661 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:52,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:52,265 INFO L93 Difference]: Finished difference Result 1079 states and 3276 transitions. [2022-03-01 17:30:52,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:30:52,265 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:52,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:52,267 INFO L225 Difference]: With dead ends: 1079 [2022-03-01 17:30:52,267 INFO L226 Difference]: Without dead ends: 980 [2022-03-01 17:30:52,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:30:52,267 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 118 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:52,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 245 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:30:52,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-03-01 17:30:52,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 838. [2022-03-01 17:30:52,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 837 states have (on average 3.154121863799283) internal successors, (2640), 837 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:52,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 2640 transitions. [2022-03-01 17:30:52,277 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 2640 transitions. Word has length 24 [2022-03-01 17:30:52,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:52,277 INFO L470 AbstractCegarLoop]: Abstraction has 838 states and 2640 transitions. [2022-03-01 17:30:52,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:52,278 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 2640 transitions. [2022-03-01 17:30:52,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:52,279 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:52,279 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:52,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-01 17:30:52,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:52,479 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:52,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:52,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2131722677, now seen corresponding path program 82 times [2022-03-01 17:30:52,480 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:52,480 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176733369] [2022-03-01 17:30:52,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:52,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:52,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:52,721 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:52,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176733369] [2022-03-01 17:30:52,721 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176733369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:52,721 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490333453] [2022-03-01 17:30:52,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:30:52,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:52,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:52,723 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:52,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-01 17:30:52,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:30:52,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:52,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:30:52,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:52,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:52,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:30:52,999 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:53,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:30:53,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:53,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:30:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:53,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:53,918 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:53,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-03-01 17:30:54,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:54,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-03-01 17:30:54,067 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:54,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-03-01 17:30:54,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:54,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490333453] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:54,110 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:54,110 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:30:54,110 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583788672] [2022-03-01 17:30:54,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:54,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:54,110 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:54,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:54,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:54,111 INFO L87 Difference]: Start difference. First operand 838 states and 2640 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:55,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:55,670 INFO L93 Difference]: Finished difference Result 1420 states and 4113 transitions. [2022-03-01 17:30:55,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:30:55,670 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:55,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:55,672 INFO L225 Difference]: With dead ends: 1420 [2022-03-01 17:30:55,672 INFO L226 Difference]: Without dead ends: 1247 [2022-03-01 17:30:55,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=234, Invalid=1248, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:30:55,673 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 204 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:55,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 367 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 907 Invalid, 0 Unknown, 116 Unchecked, 0.4s Time] [2022-03-01 17:30:55,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-03-01 17:30:55,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 839. [2022-03-01 17:30:55,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.156324582338902) internal successors, (2645), 838 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:55,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2645 transitions. [2022-03-01 17:30:55,684 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2645 transitions. Word has length 24 [2022-03-01 17:30:55,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:55,685 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 2645 transitions. [2022-03-01 17:30:55,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:55,685 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2645 transitions. [2022-03-01 17:30:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:55,686 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:55,686 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:55,702 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-01 17:30:55,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-01 17:30:55,887 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:55,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:55,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1626265269, now seen corresponding path program 83 times [2022-03-01 17:30:55,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:55,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000347233] [2022-03-01 17:30:55,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:55,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:56,137 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:56,137 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:56,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000347233] [2022-03-01 17:30:56,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000347233] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:56,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781783742] [2022-03-01 17:30:56,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:30:56,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:56,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:56,138 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:56,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-01 17:30:56,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:30:56,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:56,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:56,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:56,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:56,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:30:56,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:56,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:30:56,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:56,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:30:56,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:56,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:57,393 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:57,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-03-01 17:30:57,591 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:57,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:30:57,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:57,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:30:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:57,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781783742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:57,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:57,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:30:57,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186067159] [2022-03-01 17:30:57,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:57,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:57,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:57,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:57,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:57,647 INFO L87 Difference]: Start difference. First operand 839 states and 2645 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:57,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:57,907 INFO L93 Difference]: Finished difference Result 914 states and 2847 transitions. [2022-03-01 17:30:57,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:30:57,907 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:57,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:57,908 INFO L225 Difference]: With dead ends: 914 [2022-03-01 17:30:57,908 INFO L226 Difference]: Without dead ends: 883 [2022-03-01 17:30:57,909 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:30:57,909 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 55 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:57,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 155 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 543 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-03-01 17:30:57,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-03-01 17:30:57,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 839. [2022-03-01 17:30:57,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 838 states have (on average 3.156324582338902) internal successors, (2645), 838 states have internal predecessors, (2645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:57,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 2645 transitions. [2022-03-01 17:30:57,918 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 2645 transitions. Word has length 24 [2022-03-01 17:30:57,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:57,918 INFO L470 AbstractCegarLoop]: Abstraction has 839 states and 2645 transitions. [2022-03-01 17:30:57,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 2645 transitions. [2022-03-01 17:30:57,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:57,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:57,920 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:57,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-01 17:30:58,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:58,121 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:58,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:58,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1324378425, now seen corresponding path program 84 times [2022-03-01 17:30:58,121 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:58,121 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278293134] [2022-03-01 17:30:58,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:58,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:58,336 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:58,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278293134] [2022-03-01 17:30:58,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278293134] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:58,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966969025] [2022-03-01 17:30:58,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:30:58,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:58,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:58,338 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:58,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-01 17:30:58,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:30:58,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:58,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:30:58,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:58,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:58,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:30:58,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:58,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:30:58,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:58,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:30:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:58,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:59,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:59,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 65 [2022-03-01 17:30:59,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:59,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:30:59,397 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:59,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:30:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:30:59,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966969025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:59,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:59,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:30:59,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329991015] [2022-03-01 17:30:59,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:59,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:59,459 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:59,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:59,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:59,459 INFO L87 Difference]: Start difference. First operand 839 states and 2645 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:59,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:59,735 INFO L93 Difference]: Finished difference Result 953 states and 2982 transitions. [2022-03-01 17:30:59,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:30:59,736 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:30:59,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:59,737 INFO L225 Difference]: With dead ends: 953 [2022-03-01 17:30:59,737 INFO L226 Difference]: Without dead ends: 922 [2022-03-01 17:30:59,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:30:59,738 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 42 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:59,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 198 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 567 Invalid, 0 Unknown, 204 Unchecked, 0.2s Time] [2022-03-01 17:30:59,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-03-01 17:30:59,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 845. [2022-03-01 17:30:59,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.156398104265403) internal successors, (2664), 844 states have internal predecessors, (2664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2664 transitions. [2022-03-01 17:30:59,748 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2664 transitions. Word has length 24 [2022-03-01 17:30:59,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:59,748 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2664 transitions. [2022-03-01 17:30:59,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:59,748 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2664 transitions. [2022-03-01 17:30:59,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:30:59,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:59,749 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:59,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-01 17:30:59,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:59,950 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:30:59,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:59,950 INFO L85 PathProgramCache]: Analyzing trace with hash 916800473, now seen corresponding path program 85 times [2022-03-01 17:30:59,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:59,950 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827957080] [2022-03-01 17:30:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:59,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:00,155 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:31:00,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:00,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827957080] [2022-03-01 17:31:00,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827957080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:00,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548327817] [2022-03-01 17:31:00,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:31:00,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:00,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:00,159 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:00,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-01 17:31:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:00,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:31:00,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:00,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:00,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:31:00,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:00,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:31:00,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:00,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:31:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:31:00,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:01,078 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:01,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-03-01 17:31:01,320 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:01,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-03-01 17:31:01,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:01,325 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-03-01 17:31:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:31:01,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548327817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:01,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:01,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:01,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901296103] [2022-03-01 17:31:01,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:01,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:01,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:01,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:01,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:01,374 INFO L87 Difference]: Start difference. First operand 845 states and 2664 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:01,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:01,583 INFO L93 Difference]: Finished difference Result 927 states and 2861 transitions. [2022-03-01 17:31:01,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:31:01,583 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:01,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:01,585 INFO L225 Difference]: With dead ends: 927 [2022-03-01 17:31:01,585 INFO L226 Difference]: Without dead ends: 880 [2022-03-01 17:31:01,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:31:01,585 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:01,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 126 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 373 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-03-01 17:31:01,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-03-01 17:31:01,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 837. [2022-03-01 17:31:01,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 3.1578947368421053) internal successors, (2640), 836 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:01,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 2640 transitions. [2022-03-01 17:31:01,594 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 2640 transitions. Word has length 24 [2022-03-01 17:31:01,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:01,595 INFO L470 AbstractCegarLoop]: Abstraction has 837 states and 2640 transitions. [2022-03-01 17:31:01,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:01,595 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 2640 transitions. [2022-03-01 17:31:01,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:01,596 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:01,596 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:01,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-03-01 17:31:01,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-01 17:31:01,796 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:01,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:01,797 INFO L85 PathProgramCache]: Analyzing trace with hash 923421125, now seen corresponding path program 86 times [2022-03-01 17:31:01,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:01,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556072222] [2022-03-01 17:31:01,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:01,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:01,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:01,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556072222] [2022-03-01 17:31:01,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556072222] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:01,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424891821] [2022-03-01 17:31:01,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:31:01,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:01,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:01,942 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:01,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-01 17:31:01,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:31:01,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:01,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:01,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:02,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:31:02,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:31:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:02,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:02,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:02,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-03-01 17:31:02,706 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:02,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:31:02,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:02,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:31:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:02,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424891821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:02,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:02,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:31:02,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513868175] [2022-03-01 17:31:02,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:02,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:31:02,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:02,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:31:02,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:31:02,759 INFO L87 Difference]: Start difference. First operand 837 states and 2640 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:03,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:03,121 INFO L93 Difference]: Finished difference Result 926 states and 2849 transitions. [2022-03-01 17:31:03,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:31:03,121 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:03,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:03,123 INFO L225 Difference]: With dead ends: 926 [2022-03-01 17:31:03,123 INFO L226 Difference]: Without dead ends: 869 [2022-03-01 17:31:03,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:31:03,123 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 63 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:03,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 169 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:31:03,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-03-01 17:31:03,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 830. [2022-03-01 17:31:03,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 3.1507840772014477) internal successors, (2612), 829 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 2612 transitions. [2022-03-01 17:31:03,145 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 2612 transitions. Word has length 24 [2022-03-01 17:31:03,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:03,145 INFO L470 AbstractCegarLoop]: Abstraction has 830 states and 2612 transitions. [2022-03-01 17:31:03,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:03,145 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 2612 transitions. [2022-03-01 17:31:03,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:03,146 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:03,146 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:03,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-01 17:31:03,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-03-01 17:31:03,347 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:03,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:03,348 INFO L85 PathProgramCache]: Analyzing trace with hash -415402801, now seen corresponding path program 87 times [2022-03-01 17:31:03,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:03,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462815225] [2022-03-01 17:31:03,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:03,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:03,521 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:03,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462815225] [2022-03-01 17:31:03,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462815225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:03,521 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070419257] [2022-03-01 17:31:03,522 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:31:03,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:03,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:03,523 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:03,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-01 17:31:03,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:31:03,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:03,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:03,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:03,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-01 17:31:03,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:31:03,735 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:03,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:04,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:04,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-03-01 17:31:04,243 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:04,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:31:04,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:04,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:31:04,289 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:04,289 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070419257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:04,289 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:04,289 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:31:04,290 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617191255] [2022-03-01 17:31:04,290 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:04,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:31:04,290 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:04,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:31:04,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:31:04,290 INFO L87 Difference]: Start difference. First operand 830 states and 2612 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:04,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:04,690 INFO L93 Difference]: Finished difference Result 975 states and 3061 transitions. [2022-03-01 17:31:04,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:31:04,691 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:04,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:04,692 INFO L225 Difference]: With dead ends: 975 [2022-03-01 17:31:04,692 INFO L226 Difference]: Without dead ends: 929 [2022-03-01 17:31:04,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:31:04,693 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 103 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:04,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 177 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:31:04,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-03-01 17:31:04,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 844. [2022-03-01 17:31:04,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 843 states have (on average 3.1648873072360617) internal successors, (2668), 843 states have internal predecessors, (2668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:04,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 2668 transitions. [2022-03-01 17:31:04,702 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 2668 transitions. Word has length 24 [2022-03-01 17:31:04,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:04,702 INFO L470 AbstractCegarLoop]: Abstraction has 844 states and 2668 transitions. [2022-03-01 17:31:04,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:04,702 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 2668 transitions. [2022-03-01 17:31:04,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:04,703 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:04,703 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:04,719 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-01 17:31:04,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:04,904 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:04,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:04,904 INFO L85 PathProgramCache]: Analyzing trace with hash -997163581, now seen corresponding path program 88 times [2022-03-01 17:31:04,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:04,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787830332] [2022-03-01 17:31:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:04,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:04,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:05,144 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:05,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:05,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787830332] [2022-03-01 17:31:05,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787830332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:05,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721263844] [2022-03-01 17:31:05,144 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:31:05,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:05,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:05,148 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:05,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-01 17:31:05,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:31:05,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:05,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:31:05,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:05,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:05,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:05,348 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:05,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:31:05,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:05,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:31:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:05,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:06,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:06,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-03-01 17:31:06,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:06,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-03-01 17:31:06,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:06,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-03-01 17:31:06,422 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:06,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721263844] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:06,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:06,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:06,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496836960] [2022-03-01 17:31:06,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:06,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:06,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:06,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:06,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:06,423 INFO L87 Difference]: Start difference. First operand 844 states and 2668 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:08,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:08,253 INFO L93 Difference]: Finished difference Result 1480 states and 4270 transitions. [2022-03-01 17:31:08,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:31:08,254 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:08,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:08,256 INFO L225 Difference]: With dead ends: 1480 [2022-03-01 17:31:08,256 INFO L226 Difference]: Without dead ends: 1276 [2022-03-01 17:31:08,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=215, Invalid=1191, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:31:08,256 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 237 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:08,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 406 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1051 Invalid, 0 Unknown, 181 Unchecked, 0.5s Time] [2022-03-01 17:31:08,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2022-03-01 17:31:08,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 846. [2022-03-01 17:31:08,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 3.1680473372781064) internal successors, (2677), 845 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:08,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2677 transitions. [2022-03-01 17:31:08,268 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2677 transitions. Word has length 24 [2022-03-01 17:31:08,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:08,268 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 2677 transitions. [2022-03-01 17:31:08,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:08,268 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2677 transitions. [2022-03-01 17:31:08,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:08,269 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:08,269 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:08,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-01 17:31:08,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-01 17:31:08,470 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:08,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:08,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1112684295, now seen corresponding path program 89 times [2022-03-01 17:31:08,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:08,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237515457] [2022-03-01 17:31:08,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:08,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:08,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:08,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237515457] [2022-03-01 17:31:08,729 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237515457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:08,729 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428372374] [2022-03-01 17:31:08,729 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:31:08,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:08,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:08,732 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:08,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-01 17:31:08,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:31:08,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:08,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:08,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:08,882 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:08,882 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:08,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:08,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:31:08,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:08,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:31:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:09,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:09,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:09,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 74 [2022-03-01 17:31:09,748 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:09,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:31:09,752 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:09,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:31:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:09,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428372374] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:09,801 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:09,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:09,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802415654] [2022-03-01 17:31:09,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:09,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:09,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:09,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:09,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:09,802 INFO L87 Difference]: Start difference. First operand 846 states and 2677 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:10,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:10,096 INFO L93 Difference]: Finished difference Result 924 states and 2913 transitions. [2022-03-01 17:31:10,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:31:10,096 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:10,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:10,098 INFO L225 Difference]: With dead ends: 924 [2022-03-01 17:31:10,098 INFO L226 Difference]: Without dead ends: 893 [2022-03-01 17:31:10,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:31:10,098 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:10,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 144 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 487 Invalid, 0 Unknown, 114 Unchecked, 0.2s Time] [2022-03-01 17:31:10,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-03-01 17:31:10,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 853. [2022-03-01 17:31:10,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 853 states, 852 states have (on average 3.174882629107981) internal successors, (2705), 852 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:10,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 853 states to 853 states and 2705 transitions. [2022-03-01 17:31:10,108 INFO L78 Accepts]: Start accepts. Automaton has 853 states and 2705 transitions. Word has length 24 [2022-03-01 17:31:10,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:10,108 INFO L470 AbstractCegarLoop]: Abstraction has 853 states and 2705 transitions. [2022-03-01 17:31:10,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:10,108 INFO L276 IsEmpty]: Start isEmpty. Operand 853 states and 2705 transitions. [2022-03-01 17:31:10,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:10,109 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:10,109 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:10,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-01 17:31:10,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-03-01 17:31:10,310 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:10,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:10,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1633718827, now seen corresponding path program 90 times [2022-03-01 17:31:10,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:10,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103419588] [2022-03-01 17:31:10,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:10,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:10,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:10,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103419588] [2022-03-01 17:31:10,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103419588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:10,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091079503] [2022-03-01 17:31:10,507 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:31:10,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:10,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:10,508 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:10,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-01 17:31:10,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:31:10,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:10,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:10,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:10,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:10,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:10,867 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:10,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:31:10,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:10,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:31:10,932 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:10,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:11,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:11,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:31:11,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:11,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:31:11,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:11,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:31:11,799 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:11,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091079503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:11,799 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:11,799 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:11,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519898384] [2022-03-01 17:31:11,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:11,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:11,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:11,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:11,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:11,800 INFO L87 Difference]: Start difference. First operand 853 states and 2705 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:11,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:11,950 INFO L93 Difference]: Finished difference Result 962 states and 2985 transitions. [2022-03-01 17:31:11,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:31:11,951 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:11,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:11,952 INFO L225 Difference]: With dead ends: 962 [2022-03-01 17:31:11,952 INFO L226 Difference]: Without dead ends: 907 [2022-03-01 17:31:11,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:31:11,953 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:11,953 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 201 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 301 Invalid, 0 Unknown, 250 Unchecked, 0.1s Time] [2022-03-01 17:31:11,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-03-01 17:31:11,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 881. [2022-03-01 17:31:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 3.1556818181818183) internal successors, (2777), 880 states have internal predecessors, (2777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 2777 transitions. [2022-03-01 17:31:11,962 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 2777 transitions. Word has length 24 [2022-03-01 17:31:11,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:11,962 INFO L470 AbstractCegarLoop]: Abstraction has 881 states and 2777 transitions. [2022-03-01 17:31:11,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:11,962 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 2777 transitions. [2022-03-01 17:31:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:11,964 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:11,964 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:11,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-01 17:31:12,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-03-01 17:31:12,164 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:12,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:12,165 INFO L85 PathProgramCache]: Analyzing trace with hash 89353387, now seen corresponding path program 91 times [2022-03-01 17:31:12,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:12,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542391180] [2022-03-01 17:31:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:12,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:12,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:12,363 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:12,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542391180] [2022-03-01 17:31:12,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542391180] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:12,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320826322] [2022-03-01 17:31:12,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:31:12,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:12,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:12,365 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:12,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-01 17:31:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:12,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:12,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:12,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:12,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:12,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:12,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:31:12,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:12,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:31:12,787 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:12,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:13,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:13,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:31:13,600 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:13,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-01 17:31:13,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:13,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 17:31:13,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:13,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320826322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:13,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:13,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:13,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545011047] [2022-03-01 17:31:13,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:13,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:13,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:13,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:13,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:13,658 INFO L87 Difference]: Start difference. First operand 881 states and 2777 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:13,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:13,881 INFO L93 Difference]: Finished difference Result 926 states and 2898 transitions. [2022-03-01 17:31:13,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:31:13,882 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:13,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:13,883 INFO L225 Difference]: With dead ends: 926 [2022-03-01 17:31:13,883 INFO L226 Difference]: Without dead ends: 920 [2022-03-01 17:31:13,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:31:13,884 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 45 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 238 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:13,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 227 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 483 Invalid, 0 Unknown, 238 Unchecked, 0.2s Time] [2022-03-01 17:31:13,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-03-01 17:31:13,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 867. [2022-03-01 17:31:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 866 states have (on average 3.1651270207852193) internal successors, (2741), 866 states have internal predecessors, (2741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:13,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 2741 transitions. [2022-03-01 17:31:13,893 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 2741 transitions. Word has length 24 [2022-03-01 17:31:13,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:13,893 INFO L470 AbstractCegarLoop]: Abstraction has 867 states and 2741 transitions. [2022-03-01 17:31:13,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:13,893 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 2741 transitions. [2022-03-01 17:31:13,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:13,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:13,894 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:13,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-01 17:31:14,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:14,095 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:14,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:14,095 INFO L85 PathProgramCache]: Analyzing trace with hash 958336899, now seen corresponding path program 92 times [2022-03-01 17:31:14,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:14,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492987955] [2022-03-01 17:31:14,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:14,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:14,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:14,327 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:14,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:14,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492987955] [2022-03-01 17:31:14,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492987955] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:14,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585567699] [2022-03-01 17:31:14,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:31:14,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:14,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:14,332 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:14,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-01 17:31:14,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:31:14,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:14,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:14,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:14,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:14,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:14,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:14,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:31:14,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:14,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:31:14,844 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:14,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:15,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:15,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:31:15,740 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:15,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:31:15,746 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:15,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:31:15,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:15,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585567699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:15,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:15,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:15,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831891536] [2022-03-01 17:31:15,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:15,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:15,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:15,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:15,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:15,793 INFO L87 Difference]: Start difference. First operand 867 states and 2741 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:16,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:16,034 INFO L93 Difference]: Finished difference Result 1001 states and 3097 transitions. [2022-03-01 17:31:16,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:31:16,035 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:16,036 INFO L225 Difference]: With dead ends: 1001 [2022-03-01 17:31:16,036 INFO L226 Difference]: Without dead ends: 998 [2022-03-01 17:31:16,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:31:16,037 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 46 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 304 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:16,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 244 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 527 Invalid, 0 Unknown, 304 Unchecked, 0.2s Time] [2022-03-01 17:31:16,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2022-03-01 17:31:16,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 876. [2022-03-01 17:31:16,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 3.16) internal successors, (2765), 875 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:16,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2765 transitions. [2022-03-01 17:31:16,047 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2765 transitions. Word has length 24 [2022-03-01 17:31:16,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:16,047 INFO L470 AbstractCegarLoop]: Abstraction has 876 states and 2765 transitions. [2022-03-01 17:31:16,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:16,047 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2765 transitions. [2022-03-01 17:31:16,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:16,048 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:16,048 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:16,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-01 17:31:16,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:16,249 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:16,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:16,249 INFO L85 PathProgramCache]: Analyzing trace with hash -2128644443, now seen corresponding path program 93 times [2022-03-01 17:31:16,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:16,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852689665] [2022-03-01 17:31:16,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:16,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:16,448 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:16,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:16,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852689665] [2022-03-01 17:31:16,449 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852689665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:16,449 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928455294] [2022-03-01 17:31:16,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:31:16,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:16,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:16,450 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:16,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-01 17:31:16,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:31:16,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:16,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:16,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:16,566 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:16,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:16,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:16,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:31:16,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:16,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:31:16,801 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:16,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:17,336 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:17,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 71 [2022-03-01 17:31:17,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:17,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:31:17,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:17,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:31:17,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:17,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928455294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:17,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:17,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:17,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333806994] [2022-03-01 17:31:17,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:17,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:17,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:17,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:17,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:17,514 INFO L87 Difference]: Start difference. First operand 876 states and 2765 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:17,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:17,864 INFO L93 Difference]: Finished difference Result 929 states and 2907 transitions. [2022-03-01 17:31:17,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:31:17,865 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:17,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:17,866 INFO L225 Difference]: With dead ends: 929 [2022-03-01 17:31:17,866 INFO L226 Difference]: Without dead ends: 922 [2022-03-01 17:31:17,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:31:17,867 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:17,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 229 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 563 Invalid, 0 Unknown, 102 Unchecked, 0.2s Time] [2022-03-01 17:31:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2022-03-01 17:31:17,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 870. [2022-03-01 17:31:17,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.1611047180667433) internal successors, (2747), 869 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:17,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2747 transitions. [2022-03-01 17:31:17,876 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2747 transitions. Word has length 24 [2022-03-01 17:31:17,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:17,876 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 2747 transitions. [2022-03-01 17:31:17,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:17,876 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2747 transitions. [2022-03-01 17:31:17,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:17,877 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:17,878 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:17,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-01 17:31:18,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:18,078 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:18,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:18,078 INFO L85 PathProgramCache]: Analyzing trace with hash -926631867, now seen corresponding path program 94 times [2022-03-01 17:31:18,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:18,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475653832] [2022-03-01 17:31:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:18,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:18,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:31:18,285 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:18,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475653832] [2022-03-01 17:31:18,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475653832] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:18,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028005222] [2022-03-01 17:31:18,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:31:18,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:18,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:18,287 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:18,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-01 17:31:18,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:31:18,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:18,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:18,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:18,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:18,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:18,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:18,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:31:18,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:18,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:31:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:31:18,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:19,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:19,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:31:19,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:19,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:31:19,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:19,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:31:19,528 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:31:19,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028005222] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:19,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:19,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:19,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103644210] [2022-03-01 17:31:19,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:19,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:19,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:19,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:19,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:19,529 INFO L87 Difference]: Start difference. First operand 870 states and 2747 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:19,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:19,779 INFO L93 Difference]: Finished difference Result 943 states and 2939 transitions. [2022-03-01 17:31:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:31:19,780 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:19,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:19,781 INFO L225 Difference]: With dead ends: 943 [2022-03-01 17:31:19,781 INFO L226 Difference]: Without dead ends: 926 [2022-03-01 17:31:19,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:31:19,782 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:19,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 216 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 544 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-03-01 17:31:19,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-03-01 17:31:19,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 870. [2022-03-01 17:31:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.1611047180667433) internal successors, (2747), 869 states have internal predecessors, (2747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:19,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2747 transitions. [2022-03-01 17:31:19,791 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2747 transitions. Word has length 24 [2022-03-01 17:31:19,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:19,791 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 2747 transitions. [2022-03-01 17:31:19,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:19,791 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2747 transitions. [2022-03-01 17:31:19,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:19,792 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:19,793 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:19,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-01 17:31:19,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2022-03-01 17:31:19,993 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:19,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:19,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1736135711, now seen corresponding path program 95 times [2022-03-01 17:31:19,994 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:19,994 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648415050] [2022-03-01 17:31:19,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:19,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:31:20,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:20,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648415050] [2022-03-01 17:31:20,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648415050] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:20,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716592995] [2022-03-01 17:31:20,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:31:20,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:20,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:20,205 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:20,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-01 17:31:20,235 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:31:20,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:20,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:20,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:20,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:20,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:20,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:20,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:31:20,510 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:20,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:31:20,573 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:31:20,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:21,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:21,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:31:21,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:21,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-01 17:31:21,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:21,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 17:31:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:31:21,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716592995] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:21,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:21,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:21,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677239771] [2022-03-01 17:31:21,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:21,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:21,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:21,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:21,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:21,410 INFO L87 Difference]: Start difference. First operand 870 states and 2747 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:21,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:21,699 INFO L93 Difference]: Finished difference Result 1012 states and 3101 transitions. [2022-03-01 17:31:21,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:31:21,700 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:21,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:21,702 INFO L225 Difference]: With dead ends: 1012 [2022-03-01 17:31:21,702 INFO L226 Difference]: Without dead ends: 947 [2022-03-01 17:31:21,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:31:21,702 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:21,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 222 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 557 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-03-01 17:31:21,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-03-01 17:31:21,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 866. [2022-03-01 17:31:21,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.1641618497109825) internal successors, (2737), 865 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:21,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2737 transitions. [2022-03-01 17:31:21,716 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2737 transitions. Word has length 24 [2022-03-01 17:31:21,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:21,716 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 2737 transitions. [2022-03-01 17:31:21,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:21,716 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2737 transitions. [2022-03-01 17:31:21,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:21,718 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:21,718 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:21,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-03-01 17:31:21,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2022-03-01 17:31:21,940 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:21,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:21,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1678392525, now seen corresponding path program 96 times [2022-03-01 17:31:21,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:21,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606037736] [2022-03-01 17:31:21,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:21,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:31:22,164 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:22,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606037736] [2022-03-01 17:31:22,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606037736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:22,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784534480] [2022-03-01 17:31:22,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:31:22,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:22,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:22,166 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:22,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-01 17:31:22,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:31:22,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:22,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:22,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:22,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:22,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:22,498 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:22,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:31:22,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:22,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:31:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:31:22,560 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:23,137 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:23,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:31:23,280 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:23,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-01 17:31:23,284 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:23,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 17:31:23,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:31:23,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784534480] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:23,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:23,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:23,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280902696] [2022-03-01 17:31:23,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:23,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:23,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:23,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:23,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:23,337 INFO L87 Difference]: Start difference. First operand 866 states and 2737 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:23,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:23,483 INFO L93 Difference]: Finished difference Result 934 states and 2920 transitions. [2022-03-01 17:31:23,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:31:23,483 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:23,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:23,485 INFO L225 Difference]: With dead ends: 934 [2022-03-01 17:31:23,485 INFO L226 Difference]: Without dead ends: 919 [2022-03-01 17:31:23,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:31:23,485 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:23,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 302 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 310 Invalid, 0 Unknown, 227 Unchecked, 0.1s Time] [2022-03-01 17:31:23,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-03-01 17:31:23,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 866. [2022-03-01 17:31:23,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.1641618497109825) internal successors, (2737), 865 states have internal predecessors, (2737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:23,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2737 transitions. [2022-03-01 17:31:23,495 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2737 transitions. Word has length 24 [2022-03-01 17:31:23,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:23,495 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 2737 transitions. [2022-03-01 17:31:23,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:23,495 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2737 transitions. [2022-03-01 17:31:23,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:23,496 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:23,496 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:23,512 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-01 17:31:23,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-01 17:31:23,697 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:23,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:23,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1241360821, now seen corresponding path program 97 times [2022-03-01 17:31:23,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:23,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536554172] [2022-03-01 17:31:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:23,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:23,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:31:23,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:23,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536554172] [2022-03-01 17:31:23,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536554172] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:23,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889290273] [2022-03-01 17:31:23,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:31:23,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:23,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:23,889 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:23,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-01 17:31:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:23,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:23,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:24,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:24,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:24,219 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:24,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:31:24,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:24,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:31:24,272 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:31:24,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:24,862 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:24,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:31:25,059 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:25,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:31:25,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:25,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:31:25,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:31:25,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [889290273] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:25,114 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:25,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:25,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009224537] [2022-03-01 17:31:25,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:25,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:25,114 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:25,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:25,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:25,115 INFO L87 Difference]: Start difference. First operand 866 states and 2737 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:25,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:25,301 INFO L93 Difference]: Finished difference Result 926 states and 2898 transitions. [2022-03-01 17:31:25,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:31:25,301 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:25,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:25,303 INFO L225 Difference]: With dead ends: 926 [2022-03-01 17:31:25,303 INFO L226 Difference]: Without dead ends: 919 [2022-03-01 17:31:25,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:31:25,303 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:25,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 168 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 389 Invalid, 0 Unknown, 296 Unchecked, 0.2s Time] [2022-03-01 17:31:25,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2022-03-01 17:31:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 846. [2022-03-01 17:31:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 3.1680473372781064) internal successors, (2677), 845 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2677 transitions. [2022-03-01 17:31:25,312 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2677 transitions. Word has length 24 [2022-03-01 17:31:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:25,313 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 2677 transitions. [2022-03-01 17:31:25,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:25,313 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2677 transitions. [2022-03-01 17:31:25,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:25,314 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:25,314 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:25,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-01 17:31:25,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:25,515 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:25,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:25,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1149316057, now seen corresponding path program 98 times [2022-03-01 17:31:25,516 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:25,516 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22139720] [2022-03-01 17:31:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:25,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:25,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:25,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:25,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22139720] [2022-03-01 17:31:25,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22139720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:25,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762960196] [2022-03-01 17:31:25,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:31:25,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:25,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:25,715 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:25,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-01 17:31:25,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:31:25,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:25,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:25,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:25,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:25,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:25,944 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:25,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:31:25,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:25,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:31:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:26,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:26,552 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:26,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:31:26,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:26,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:31:26,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:26,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:31:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:26,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762960196] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:26,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:26,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:26,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579703302] [2022-03-01 17:31:26,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:26,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:26,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:26,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:26,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:26,804 INFO L87 Difference]: Start difference. First operand 846 states and 2677 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:27,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:27,109 INFO L93 Difference]: Finished difference Result 939 states and 2924 transitions. [2022-03-01 17:31:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:31:27,109 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:27,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:27,110 INFO L225 Difference]: With dead ends: 939 [2022-03-01 17:31:27,110 INFO L226 Difference]: Without dead ends: 904 [2022-03-01 17:31:27,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:31:27,111 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:27,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 212 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 538 Invalid, 0 Unknown, 103 Unchecked, 0.2s Time] [2022-03-01 17:31:27,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-03-01 17:31:27,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 848. [2022-03-01 17:31:27,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 847 states have (on average 3.166469893742621) internal successors, (2682), 847 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 2682 transitions. [2022-03-01 17:31:27,121 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 2682 transitions. Word has length 24 [2022-03-01 17:31:27,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:27,121 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 2682 transitions. [2022-03-01 17:31:27,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:27,121 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 2682 transitions. [2022-03-01 17:31:27,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:27,122 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:27,122 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:27,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-01 17:31:27,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-03-01 17:31:27,323 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:27,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:27,323 INFO L85 PathProgramCache]: Analyzing trace with hash 1838326243, now seen corresponding path program 99 times [2022-03-01 17:31:27,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:27,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349326004] [2022-03-01 17:31:27,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:27,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:27,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:27,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:27,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349326004] [2022-03-01 17:31:27,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349326004] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:27,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545934566] [2022-03-01 17:31:27,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:31:27,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:27,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:27,561 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:27,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-01 17:31:27,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:31:27,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:27,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:27,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:27,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:27,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:27,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:27,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:31:27,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:27,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:31:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:27,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:28,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:28,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:31:28,579 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:28,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:31:28,583 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:28,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:31:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:28,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545934566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:28,633 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:28,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:28,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936002870] [2022-03-01 17:31:28,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:28,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:28,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:28,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:28,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:28,634 INFO L87 Difference]: Start difference. First operand 848 states and 2682 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:28,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:28,895 INFO L93 Difference]: Finished difference Result 941 states and 2941 transitions. [2022-03-01 17:31:28,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:31:28,895 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:28,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:28,897 INFO L225 Difference]: With dead ends: 941 [2022-03-01 17:31:28,897 INFO L226 Difference]: Without dead ends: 910 [2022-03-01 17:31:28,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:28,897 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 60 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:28,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 212 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 640 Invalid, 0 Unknown, 133 Unchecked, 0.3s Time] [2022-03-01 17:31:28,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2022-03-01 17:31:28,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 846. [2022-03-01 17:31:28,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 3.1680473372781064) internal successors, (2677), 845 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:28,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 2677 transitions. [2022-03-01 17:31:28,907 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 2677 transitions. Word has length 24 [2022-03-01 17:31:28,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:28,907 INFO L470 AbstractCegarLoop]: Abstraction has 846 states and 2677 transitions. [2022-03-01 17:31:28,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:28,907 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 2677 transitions. [2022-03-01 17:31:28,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:28,908 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:28,908 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:28,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-03-01 17:31:29,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-01 17:31:29,111 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:29,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:29,112 INFO L85 PathProgramCache]: Analyzing trace with hash -577997105, now seen corresponding path program 100 times [2022-03-01 17:31:29,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:29,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140701708] [2022-03-01 17:31:29,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:29,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:31:29,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:29,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140701708] [2022-03-01 17:31:29,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140701708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:29,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930168955] [2022-03-01 17:31:29,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:31:29,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:29,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:29,395 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:29,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-01 17:31:29,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:31:29,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:29,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:31:29,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:29,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:29,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:31:29,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:29,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-01 17:31:29,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-01 17:31:29,769 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:29,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:30,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:30,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 123 [2022-03-01 17:31:30,689 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:30,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 98 [2022-03-01 17:31:30,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:30,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 76 [2022-03-01 17:31:30,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:30,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930168955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:30,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:30,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2022-03-01 17:31:30,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729541282] [2022-03-01 17:31:30,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:30,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:31:30,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:30,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:31:30,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:31:30,794 INFO L87 Difference]: Start difference. First operand 846 states and 2677 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:31,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:31,414 INFO L93 Difference]: Finished difference Result 1018 states and 3154 transitions. [2022-03-01 17:31:31,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:31:31,414 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:31,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:31,416 INFO L225 Difference]: With dead ends: 1018 [2022-03-01 17:31:31,416 INFO L226 Difference]: Without dead ends: 973 [2022-03-01 17:31:31,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:31:31,416 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:31,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 234 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 680 Invalid, 0 Unknown, 174 Unchecked, 0.3s Time] [2022-03-01 17:31:31,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-03-01 17:31:31,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 852. [2022-03-01 17:31:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 851 states have (on average 3.1703877790834314) internal successors, (2698), 851 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:31,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 2698 transitions. [2022-03-01 17:31:31,427 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 2698 transitions. Word has length 24 [2022-03-01 17:31:31,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:31,427 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 2698 transitions. [2022-03-01 17:31:31,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:31,427 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 2698 transitions. [2022-03-01 17:31:31,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:31,428 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:31,428 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:31,444 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-01 17:31:31,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:31,629 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:31,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:31,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1742439369, now seen corresponding path program 101 times [2022-03-01 17:31:31,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:31,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996422953] [2022-03-01 17:31:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:31,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:31,900 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:31,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996422953] [2022-03-01 17:31:31,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996422953] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:31,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396827011] [2022-03-01 17:31:31,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:31:31,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:31,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:31,904 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:31,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-01 17:31:31,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:31:31,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:31,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:31,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:32,036 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:32,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:31:32,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:32,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-01 17:31:32,216 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:32,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2022-03-01 17:31:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:32,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:32,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:32,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 120 [2022-03-01 17:31:33,027 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:33,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 70 [2022-03-01 17:31:33,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:33,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 54 [2022-03-01 17:31:33,157 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:33,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396827011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:33,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:33,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:33,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962449268] [2022-03-01 17:31:33,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:33,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:33,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:33,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:33,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:33,159 INFO L87 Difference]: Start difference. First operand 852 states and 2698 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:33,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:33,751 INFO L93 Difference]: Finished difference Result 1006 states and 3142 transitions. [2022-03-01 17:31:33,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:31:33,751 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:33,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:33,753 INFO L225 Difference]: With dead ends: 1006 [2022-03-01 17:31:33,753 INFO L226 Difference]: Without dead ends: 929 [2022-03-01 17:31:33,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:31:33,753 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 41 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 204 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:33,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 445 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 677 Invalid, 0 Unknown, 204 Unchecked, 0.3s Time] [2022-03-01 17:31:33,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 929 states. [2022-03-01 17:31:33,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 929 to 854. [2022-03-01 17:31:33,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 854 states, 853 states have (on average 3.168815943728019) internal successors, (2703), 853 states have internal predecessors, (2703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:33,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 854 states to 854 states and 2703 transitions. [2022-03-01 17:31:33,763 INFO L78 Accepts]: Start accepts. Automaton has 854 states and 2703 transitions. Word has length 24 [2022-03-01 17:31:33,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:33,763 INFO L470 AbstractCegarLoop]: Abstraction has 854 states and 2703 transitions. [2022-03-01 17:31:33,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:33,763 INFO L276 IsEmpty]: Start isEmpty. Operand 854 states and 2703 transitions. [2022-03-01 17:31:33,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:33,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:33,764 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:33,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-01 17:31:33,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:33,965 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:33,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:33,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1703905455, now seen corresponding path program 102 times [2022-03-01 17:31:33,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:33,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283639853] [2022-03-01 17:31:33,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:33,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:33,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:34,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:34,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283639853] [2022-03-01 17:31:34,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283639853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:34,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849209276] [2022-03-01 17:31:34,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:31:34,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:34,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:34,196 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:34,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-01 17:31:34,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:31:34,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:34,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:34,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:34,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:34,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:31:34,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:34,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-01 17:31:34,505 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:34,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-03-01 17:31:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:34,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:35,092 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:35,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2022-03-01 17:31:35,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:35,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 130 [2022-03-01 17:31:35,365 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:35,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 102 [2022-03-01 17:31:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:35,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849209276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:35,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:35,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:35,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735272946] [2022-03-01 17:31:35,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:35,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:35,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:35,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:35,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:35,511 INFO L87 Difference]: Start difference. First operand 854 states and 2703 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:35,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:35,807 INFO L93 Difference]: Finished difference Result 957 states and 2997 transitions. [2022-03-01 17:31:35,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:31:35,807 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:35,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:35,809 INFO L225 Difference]: With dead ends: 957 [2022-03-01 17:31:35,809 INFO L226 Difference]: Without dead ends: 918 [2022-03-01 17:31:35,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:31:35,809 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:35,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 215 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 325 Invalid, 0 Unknown, 160 Unchecked, 0.2s Time] [2022-03-01 17:31:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 918 states. [2022-03-01 17:31:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 918 to 858. [2022-03-01 17:31:35,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 3.1703617269544924) internal successors, (2717), 857 states have internal predecessors, (2717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:35,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 2717 transitions. [2022-03-01 17:31:35,819 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 2717 transitions. Word has length 24 [2022-03-01 17:31:35,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:35,819 INFO L470 AbstractCegarLoop]: Abstraction has 858 states and 2717 transitions. [2022-03-01 17:31:35,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:35,819 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 2717 transitions. [2022-03-01 17:31:35,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:35,820 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:35,820 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:35,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-01 17:31:36,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-03-01 17:31:36,021 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:36,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:36,021 INFO L85 PathProgramCache]: Analyzing trace with hash -269446261, now seen corresponding path program 103 times [2022-03-01 17:31:36,021 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:36,021 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619413440] [2022-03-01 17:31:36,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:36,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:36,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:36,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:36,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619413440] [2022-03-01 17:31:36,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1619413440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:36,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20872915] [2022-03-01 17:31:36,250 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:31:36,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:36,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:36,252 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:36,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-01 17:31:36,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:36,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:31:36,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:36,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:36,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:31:36,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:36,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-01 17:31:36,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:36,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:31:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:36,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:37,346 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:37,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 123 [2022-03-01 17:31:37,604 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:37,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 101 [2022-03-01 17:31:37,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:37,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 79 [2022-03-01 17:31:37,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:37,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20872915] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:37,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:37,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:31:37,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608651048] [2022-03-01 17:31:37,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:37,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:31:37,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:37,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:31:37,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:31:37,732 INFO L87 Difference]: Start difference. First operand 858 states and 2717 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:39,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:39,034 INFO L93 Difference]: Finished difference Result 1446 states and 4241 transitions. [2022-03-01 17:31:39,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:31:39,034 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:39,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:39,036 INFO L225 Difference]: With dead ends: 1446 [2022-03-01 17:31:39,036 INFO L226 Difference]: Without dead ends: 1273 [2022-03-01 17:31:39,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 9 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:31:39,036 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 184 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:39,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 281 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 763 Invalid, 0 Unknown, 38 Unchecked, 0.4s Time] [2022-03-01 17:31:39,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2022-03-01 17:31:39,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 862. [2022-03-01 17:31:39,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.1718931475029035) internal successors, (2731), 861 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2731 transitions. [2022-03-01 17:31:39,054 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2731 transitions. Word has length 24 [2022-03-01 17:31:39,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:39,054 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 2731 transitions. [2022-03-01 17:31:39,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:39,054 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2731 transitions. [2022-03-01 17:31:39,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:39,056 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:39,056 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:39,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-01 17:31:39,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:39,278 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:39,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:39,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1992554091, now seen corresponding path program 104 times [2022-03-01 17:31:39,278 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:39,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381610278] [2022-03-01 17:31:39,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:39,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:39,513 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:39,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381610278] [2022-03-01 17:31:39,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381610278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:39,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360193781] [2022-03-01 17:31:39,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:31:39,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:39,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:39,514 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:39,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-01 17:31:39,544 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:31:39,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:39,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:39,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:39,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:39,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:31:39,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:39,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 42 [2022-03-01 17:31:39,793 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:39,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-03-01 17:31:39,885 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:39,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:40,353 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:40,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-01 17:31:40,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:40,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 150 treesize of output 130 [2022-03-01 17:31:40,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:40,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 102 [2022-03-01 17:31:40,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:40,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360193781] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:40,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:40,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:40,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433374950] [2022-03-01 17:31:40,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:40,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:40,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:40,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:40,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:40,743 INFO L87 Difference]: Start difference. First operand 862 states and 2731 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:41,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:41,081 INFO L93 Difference]: Finished difference Result 965 states and 3022 transitions. [2022-03-01 17:31:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:31:41,081 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:41,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:41,082 INFO L225 Difference]: With dead ends: 965 [2022-03-01 17:31:41,082 INFO L226 Difference]: Without dead ends: 926 [2022-03-01 17:31:41,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:31:41,083 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:41,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 270 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 429 Invalid, 0 Unknown, 112 Unchecked, 0.2s Time] [2022-03-01 17:31:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-03-01 17:31:41,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 862. [2022-03-01 17:31:41,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 3.1718931475029035) internal successors, (2731), 861 states have internal predecessors, (2731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 2731 transitions. [2022-03-01 17:31:41,092 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 2731 transitions. Word has length 24 [2022-03-01 17:31:41,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:41,092 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 2731 transitions. [2022-03-01 17:31:41,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:41,093 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 2731 transitions. [2022-03-01 17:31:41,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:41,094 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:41,094 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:41,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-03-01 17:31:41,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:41,295 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:41,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:41,295 INFO L85 PathProgramCache]: Analyzing trace with hash 894128687, now seen corresponding path program 105 times [2022-03-01 17:31:41,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:41,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933912075] [2022-03-01 17:31:41,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:41,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:41,540 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:41,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933912075] [2022-03-01 17:31:41,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933912075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:41,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671294691] [2022-03-01 17:31:41,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:31:41,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:41,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:41,542 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:41,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-01 17:31:41,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:31:41,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:41,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:41,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:41,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:41,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:31:41,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:41,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-01 17:31:41,755 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:41,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-03-01 17:31:41,879 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:41,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:42,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:42,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-01 17:31:42,559 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:42,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 124 [2022-03-01 17:31:42,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:42,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 96 [2022-03-01 17:31:42,701 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:42,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671294691] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:42,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:42,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:42,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428198258] [2022-03-01 17:31:42,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:42,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:42,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:42,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:42,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:42,702 INFO L87 Difference]: Start difference. First operand 862 states and 2731 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:43,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:43,518 INFO L93 Difference]: Finished difference Result 1158 states and 3484 transitions. [2022-03-01 17:31:43,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:31:43,518 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:43,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:43,521 INFO L225 Difference]: With dead ends: 1158 [2022-03-01 17:31:43,521 INFO L226 Difference]: Without dead ends: 1037 [2022-03-01 17:31:43,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:31:43,521 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 92 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 320 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:43,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 314 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 825 Invalid, 0 Unknown, 320 Unchecked, 0.4s Time] [2022-03-01 17:31:43,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-03-01 17:31:43,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 878. [2022-03-01 17:31:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.1641961231470925) internal successors, (2775), 877 states have internal predecessors, (2775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:43,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2775 transitions. [2022-03-01 17:31:43,536 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2775 transitions. Word has length 24 [2022-03-01 17:31:43,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:43,537 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 2775 transitions. [2022-03-01 17:31:43,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:43,537 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2775 transitions. [2022-03-01 17:31:43,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:43,538 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:43,538 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:43,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-01 17:31:43,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable120 [2022-03-01 17:31:43,762 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:43,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1110876975, now seen corresponding path program 106 times [2022-03-01 17:31:43,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:43,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416269433] [2022-03-01 17:31:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:43,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:31:44,054 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:44,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416269433] [2022-03-01 17:31:44,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416269433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:44,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534354662] [2022-03-01 17:31:44,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:31:44,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:44,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:44,056 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:44,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-01 17:31:44,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:31:44,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:44,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:31:44,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:44,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:44,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:31:44,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:44,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-01 17:31:44,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:44,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-03-01 17:31:44,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:31:44,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:45,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:45,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 123 [2022-03-01 17:31:45,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:45,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-03-01 17:31:45,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:45,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 78 [2022-03-01 17:31:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:31:45,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534354662] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:45,350 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:45,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:45,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287199913] [2022-03-01 17:31:45,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:45,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:45,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:45,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:45,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:45,351 INFO L87 Difference]: Start difference. First operand 878 states and 2775 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:45,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:45,898 INFO L93 Difference]: Finished difference Result 1094 states and 3347 transitions. [2022-03-01 17:31:45,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:31:45,898 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:45,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:45,900 INFO L225 Difference]: With dead ends: 1094 [2022-03-01 17:31:45,900 INFO L226 Difference]: Without dead ends: 1025 [2022-03-01 17:31:45,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:31:45,900 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 86 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:45,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 221 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 625 Invalid, 0 Unknown, 121 Unchecked, 0.3s Time] [2022-03-01 17:31:45,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2022-03-01 17:31:45,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 870. [2022-03-01 17:31:45,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 870 states, 869 states have (on average 3.174913693901036) internal successors, (2759), 869 states have internal predecessors, (2759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:45,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 870 states to 870 states and 2759 transitions. [2022-03-01 17:31:45,916 INFO L78 Accepts]: Start accepts. Automaton has 870 states and 2759 transitions. Word has length 24 [2022-03-01 17:31:45,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:45,916 INFO L470 AbstractCegarLoop]: Abstraction has 870 states and 2759 transitions. [2022-03-01 17:31:45,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:45,916 INFO L276 IsEmpty]: Start isEmpty. Operand 870 states and 2759 transitions. [2022-03-01 17:31:45,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:45,918 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:45,918 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:45,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-01 17:31:46,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:46,140 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:46,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:46,141 INFO L85 PathProgramCache]: Analyzing trace with hash 135828057, now seen corresponding path program 107 times [2022-03-01 17:31:46,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:46,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946956012] [2022-03-01 17:31:46,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:46,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:46,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:46,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946956012] [2022-03-01 17:31:46,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946956012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:46,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754063474] [2022-03-01 17:31:46,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:31:46,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:46,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:46,382 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:46,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-01 17:31:46,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:31:46,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:46,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:46,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:46,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:46,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:46,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:46,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:31:46,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:46,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:31:46,723 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:46,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:47,312 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:47,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-03-01 17:31:47,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:47,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 76 [2022-03-01 17:31:47,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:47,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 60 [2022-03-01 17:31:47,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:47,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754063474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:47,523 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:47,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:47,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589328136] [2022-03-01 17:31:47,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:47,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:47,524 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:47,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:47,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:47,524 INFO L87 Difference]: Start difference. First operand 870 states and 2759 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:48,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:48,331 INFO L93 Difference]: Finished difference Result 1084 states and 3375 transitions. [2022-03-01 17:31:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:31:48,332 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:48,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:48,333 INFO L225 Difference]: With dead ends: 1084 [2022-03-01 17:31:48,334 INFO L226 Difference]: Without dead ends: 987 [2022-03-01 17:31:48,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:31:48,334 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 111 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:48,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 216 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 795 Invalid, 0 Unknown, 54 Unchecked, 0.4s Time] [2022-03-01 17:31:48,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-03-01 17:31:48,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 873. [2022-03-01 17:31:48,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 3.1743119266055047) internal successors, (2768), 872 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:48,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2768 transitions. [2022-03-01 17:31:48,344 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2768 transitions. Word has length 24 [2022-03-01 17:31:48,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:48,344 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 2768 transitions. [2022-03-01 17:31:48,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:48,344 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2768 transitions. [2022-03-01 17:31:48,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:48,345 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:48,346 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:48,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-01 17:31:48,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-03-01 17:31:48,546 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:48,546 INFO L85 PathProgramCache]: Analyzing trace with hash 20307343, now seen corresponding path program 108 times [2022-03-01 17:31:48,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:48,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470338202] [2022-03-01 17:31:48,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:48,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:48,795 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:48,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470338202] [2022-03-01 17:31:48,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470338202] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:48,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345072630] [2022-03-01 17:31:48,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:31:48,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:48,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:48,797 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:48,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-01 17:31:48,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:31:48,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:48,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:31:48,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:48,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:48,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:49,040 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:49,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:31:49,043 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:49,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:31:49,183 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:49,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:49,826 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:49,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 67 [2022-03-01 17:31:49,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:49,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 93 [2022-03-01 17:31:49,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:49,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 73 [2022-03-01 17:31:50,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:50,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345072630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:50,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:50,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:50,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186027235] [2022-03-01 17:31:50,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:50,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:50,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:50,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:50,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:50,052 INFO L87 Difference]: Start difference. First operand 873 states and 2768 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:50,925 INFO L93 Difference]: Finished difference Result 1379 states and 4138 transitions. [2022-03-01 17:31:50,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:31:50,926 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:50,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:50,928 INFO L225 Difference]: With dead ends: 1379 [2022-03-01 17:31:50,928 INFO L226 Difference]: Without dead ends: 1226 [2022-03-01 17:31:50,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:31:50,928 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 174 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:50,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 238 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 664 Invalid, 0 Unknown, 136 Unchecked, 0.3s Time] [2022-03-01 17:31:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2022-03-01 17:31:50,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 895. [2022-03-01 17:31:50,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.1946308724832213) internal successors, (2856), 894 states have internal predecessors, (2856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:50,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 2856 transitions. [2022-03-01 17:31:50,940 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 2856 transitions. Word has length 24 [2022-03-01 17:31:50,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:50,940 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 2856 transitions. [2022-03-01 17:31:50,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:50,940 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 2856 transitions. [2022-03-01 17:31:50,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:50,941 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:50,942 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:50,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-03-01 17:31:51,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:51,142 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:51,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:51,142 INFO L85 PathProgramCache]: Analyzing trace with hash 686065433, now seen corresponding path program 109 times [2022-03-01 17:31:51,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:51,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105236194] [2022-03-01 17:31:51,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:51,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:51,378 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:31:51,379 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:51,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105236194] [2022-03-01 17:31:51,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105236194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:51,379 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288699325] [2022-03-01 17:31:51,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:31:51,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:51,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:51,380 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:51,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-01 17:31:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:51,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:31:51,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:51,504 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:51,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:51,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:51,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:31:51,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:51,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:31:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:31:51,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:52,580 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:52,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 67 [2022-03-01 17:31:52,696 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:52,696 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 93 [2022-03-01 17:31:52,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:52,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 73 [2022-03-01 17:31:52,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:31:52,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288699325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:52,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:52,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:52,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899667714] [2022-03-01 17:31:52,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:52,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:52,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:52,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:52,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:52,794 INFO L87 Difference]: Start difference. First operand 895 states and 2856 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:53,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:53,630 INFO L93 Difference]: Finished difference Result 1405 states and 4250 transitions. [2022-03-01 17:31:53,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:31:53,630 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:53,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:53,632 INFO L225 Difference]: With dead ends: 1405 [2022-03-01 17:31:53,632 INFO L226 Difference]: Without dead ends: 1291 [2022-03-01 17:31:53,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:31:53,633 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 121 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:53,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 298 Invalid, 863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 821 Invalid, 0 Unknown, 10 Unchecked, 0.4s Time] [2022-03-01 17:31:53,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-03-01 17:31:53,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 932. [2022-03-01 17:31:53,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 932 states, 931 states have (on average 3.23093447905478) internal successors, (3008), 931 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 3008 transitions. [2022-03-01 17:31:53,645 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 3008 transitions. Word has length 24 [2022-03-01 17:31:53,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:53,645 INFO L470 AbstractCegarLoop]: Abstraction has 932 states and 3008 transitions. [2022-03-01 17:31:53,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:53,645 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 3008 transitions. [2022-03-01 17:31:53,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:53,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:53,646 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:53,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-01 17:31:53,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-01 17:31:53,847 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:53,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:53,847 INFO L85 PathProgramCache]: Analyzing trace with hash -420500503, now seen corresponding path program 110 times [2022-03-01 17:31:53,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:53,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432820372] [2022-03-01 17:31:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:53,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:54,093 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:54,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432820372] [2022-03-01 17:31:54,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432820372] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:54,093 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927090770] [2022-03-01 17:31:54,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:31:54,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:54,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:54,094 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:54,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-01 17:31:54,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:31:54,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:54,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:54,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:54,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:54,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:31:54,441 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:54,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:55,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:55,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-01 17:31:55,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:55,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 124 [2022-03-01 17:31:55,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:55,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 96 [2022-03-01 17:31:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:55,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927090770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:55,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:55,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:31:55,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164958460] [2022-03-01 17:31:55,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:55,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:31:55,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:55,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:31:55,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:31:55,449 INFO L87 Difference]: Start difference. First operand 932 states and 3008 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:56,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:56,035 INFO L93 Difference]: Finished difference Result 1141 states and 3558 transitions. [2022-03-01 17:31:56,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:31:56,036 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:56,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:56,038 INFO L225 Difference]: With dead ends: 1141 [2022-03-01 17:31:56,038 INFO L226 Difference]: Without dead ends: 1089 [2022-03-01 17:31:56,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:31:56,038 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 74 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 1065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:56,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 275 Invalid, 1065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:31:56,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-03-01 17:31:56,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 930. [2022-03-01 17:31:56,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 3.2378902045209905) internal successors, (3008), 929 states have internal predecessors, (3008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:56,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 3008 transitions. [2022-03-01 17:31:56,049 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 3008 transitions. Word has length 24 [2022-03-01 17:31:56,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:56,049 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 3008 transitions. [2022-03-01 17:31:56,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:56,049 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 3008 transitions. [2022-03-01 17:31:56,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:56,050 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:56,050 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:56,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-01 17:31:56,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-01 17:31:56,251 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:56,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:56,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2012659601, now seen corresponding path program 111 times [2022-03-01 17:31:56,251 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:56,251 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650934218] [2022-03-01 17:31:56,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:56,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:56,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:56,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650934218] [2022-03-01 17:31:56,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650934218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:56,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108364847] [2022-03-01 17:31:56,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:31:56,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:56,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:56,458 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:56,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-01 17:31:56,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:31:56,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:56,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:31:56,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:56,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:56,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:56,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:56,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:31:56,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:56,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:31:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:56,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:57,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:57,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-01 17:31:57,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:57,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 124 [2022-03-01 17:31:57,520 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:57,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 96 [2022-03-01 17:31:57,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:57,639 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108364847] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:57,639 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:57,639 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:31:57,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758116485] [2022-03-01 17:31:57,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:57,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:57,639 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:57,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:57,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:57,640 INFO L87 Difference]: Start difference. First operand 930 states and 3008 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:58,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:58,014 INFO L93 Difference]: Finished difference Result 1043 states and 3309 transitions. [2022-03-01 17:31:58,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:31:58,015 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:31:58,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:58,016 INFO L225 Difference]: With dead ends: 1043 [2022-03-01 17:31:58,016 INFO L226 Difference]: Without dead ends: 1008 [2022-03-01 17:31:58,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:31:58,017 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:58,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 223 Invalid, 755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 684 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-03-01 17:31:58,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2022-03-01 17:31:58,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 928. [2022-03-01 17:31:58,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 3.2394822006472492) internal successors, (3003), 927 states have internal predecessors, (3003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:58,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 3003 transitions. [2022-03-01 17:31:58,027 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 3003 transitions. Word has length 24 [2022-03-01 17:31:58,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:58,028 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 3003 transitions. [2022-03-01 17:31:58,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:58,028 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 3003 transitions. [2022-03-01 17:31:58,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:31:58,029 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:58,029 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:58,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-01 17:31:58,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2022-03-01 17:31:58,231 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:31:58,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:58,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1875725259, now seen corresponding path program 112 times [2022-03-01 17:31:58,232 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:58,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746832171] [2022-03-01 17:31:58,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:58,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:58,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:58,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:58,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746832171] [2022-03-01 17:31:58,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746832171] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:58,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278991265] [2022-03-01 17:31:58,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:31:58,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:58,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:58,414 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:58,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-01 17:31:58,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:31:58,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:58,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:31:58,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:58,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:31:58,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:31:58,705 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:58,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:59,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:59,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-03-01 17:31:59,259 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:31:59,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:31:59,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:31:59,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278991265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:59,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:59,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-01 17:31:59,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963278776] [2022-03-01 17:31:59,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:59,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:31:59,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:59,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:31:59,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:31:59,267 INFO L87 Difference]: Start difference. First operand 928 states and 3003 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:01,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:01,603 INFO L93 Difference]: Finished difference Result 1884 states and 5601 transitions. [2022-03-01 17:32:01,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:32:01,604 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:01,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:01,607 INFO L225 Difference]: With dead ends: 1884 [2022-03-01 17:32:01,607 INFO L226 Difference]: Without dead ends: 1695 [2022-03-01 17:32:01,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=543, Invalid=2319, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:32:01,607 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 410 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:01,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 334 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:32:01,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1695 states. [2022-03-01 17:32:01,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1695 to 962. [2022-03-01 17:32:01,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 3.2455775234131115) internal successors, (3119), 961 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:01,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 3119 transitions. [2022-03-01 17:32:01,623 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 3119 transitions. Word has length 24 [2022-03-01 17:32:01,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:01,623 INFO L470 AbstractCegarLoop]: Abstraction has 962 states and 3119 transitions. [2022-03-01 17:32:01,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:01,623 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 3119 transitions. [2022-03-01 17:32:01,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:01,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:01,625 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:01,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2022-03-01 17:32:01,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-03-01 17:32:01,825 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:01,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:01,826 INFO L85 PathProgramCache]: Analyzing trace with hash -226534959, now seen corresponding path program 113 times [2022-03-01 17:32:01,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:01,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145199682] [2022-03-01 17:32:01,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:01,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:01,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:01,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:01,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:01,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145199682] [2022-03-01 17:32:01,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145199682] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:01,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787803064] [2022-03-01 17:32:01,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:32:01,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:01,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:01,996 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:01,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-01 17:32:02,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:32:02,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:02,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:02,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:02,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:32:02,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:32:02,301 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:02,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:02,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:02,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-01 17:32:02,979 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:02,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:02,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:02,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787803064] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:02,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:02,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:32:02,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467946315] [2022-03-01 17:32:02,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:02,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:02,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:02,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:02,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:02,985 INFO L87 Difference]: Start difference. First operand 962 states and 3119 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:04,667 INFO L93 Difference]: Finished difference Result 1499 states and 4618 transitions. [2022-03-01 17:32:04,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:32:04,667 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:04,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:04,670 INFO L225 Difference]: With dead ends: 1499 [2022-03-01 17:32:04,670 INFO L226 Difference]: Without dead ends: 1410 [2022-03-01 17:32:04,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=329, Invalid=1563, Unknown=0, NotChecked=0, Total=1892 [2022-03-01 17:32:04,670 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 176 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:04,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 346 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:32:04,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2022-03-01 17:32:04,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 975. [2022-03-01 17:32:04,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 3.246406570841889) internal successors, (3162), 974 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:04,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 3162 transitions. [2022-03-01 17:32:04,684 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 3162 transitions. Word has length 24 [2022-03-01 17:32:04,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:04,684 INFO L470 AbstractCegarLoop]: Abstraction has 975 states and 3162 transitions. [2022-03-01 17:32:04,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:04,684 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 3162 transitions. [2022-03-01 17:32:04,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:04,685 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:04,685 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:04,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-01 17:32:04,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:04,886 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:04,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:04,886 INFO L85 PathProgramCache]: Analyzing trace with hash 937398215, now seen corresponding path program 114 times [2022-03-01 17:32:04,886 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:04,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457147532] [2022-03-01 17:32:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:04,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:05,056 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:05,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:05,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457147532] [2022-03-01 17:32:05,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457147532] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:05,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729261164] [2022-03-01 17:32:05,057 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:32:05,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:05,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:05,058 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:05,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-01 17:32:05,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:32:05,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:05,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:05,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:05,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:32:05,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:32:05,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:05,417 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:06,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:06,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-03-01 17:32:06,059 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:06,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:06,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729261164] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:06,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:06,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:32:06,065 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732898860] [2022-03-01 17:32:06,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:06,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:32:06,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:06,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:32:06,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:32:06,066 INFO L87 Difference]: Start difference. First operand 975 states and 3162 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:09,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:09,688 INFO L93 Difference]: Finished difference Result 1924 states and 5645 transitions. [2022-03-01 17:32:09,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:32:09,688 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:09,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:09,691 INFO L225 Difference]: With dead ends: 1924 [2022-03-01 17:32:09,691 INFO L226 Difference]: Without dead ends: 1747 [2022-03-01 17:32:09,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=573, Invalid=2507, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 17:32:09,692 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 279 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:09,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [279 Valid, 510 Invalid, 1701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1628 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:32:09,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2022-03-01 17:32:09,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1002. [2022-03-01 17:32:09,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 3.24975024975025) internal successors, (3253), 1001 states have internal predecessors, (3253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:09,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 3253 transitions. [2022-03-01 17:32:09,707 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 3253 transitions. Word has length 24 [2022-03-01 17:32:09,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:09,707 INFO L470 AbstractCegarLoop]: Abstraction has 1002 states and 3253 transitions. [2022-03-01 17:32:09,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:09,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 3253 transitions. [2022-03-01 17:32:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:09,708 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:09,708 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:09,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2022-03-01 17:32:09,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:09,909 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:09,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:09,909 INFO L85 PathProgramCache]: Analyzing trace with hash -137251129, now seen corresponding path program 115 times [2022-03-01 17:32:09,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:09,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122696729] [2022-03-01 17:32:09,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:09,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:09,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:32:10,129 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:10,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122696729] [2022-03-01 17:32:10,129 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122696729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:10,129 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861725773] [2022-03-01 17:32:10,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:32:10,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:10,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:10,132 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:10,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-01 17:32:10,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:10,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:32:10,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:10,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:32:10,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:32:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:32:10,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:11,475 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:11,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-03-01 17:32:11,591 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:11,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:32:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:32:11,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861725773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:11,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:11,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-01 17:32:11,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295733568] [2022-03-01 17:32:11,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:11,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:32:11,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:11,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:32:11,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:32:11,598 INFO L87 Difference]: Start difference. First operand 1002 states and 3253 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:14,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:14,701 INFO L93 Difference]: Finished difference Result 2460 states and 7178 transitions. [2022-03-01 17:32:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:32:14,702 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:14,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:14,705 INFO L225 Difference]: With dead ends: 2460 [2022-03-01 17:32:14,705 INFO L226 Difference]: Without dead ends: 2253 [2022-03-01 17:32:14,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=551, Invalid=2641, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 17:32:14,705 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 299 mSDsluCounter, 871 mSDsCounter, 0 mSdLazyCounter, 1456 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:14,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 474 Invalid, 1553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1456 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-01 17:32:14,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2022-03-01 17:32:14,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 997. [2022-03-01 17:32:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 997 states, 996 states have (on average 3.2580321285140563) internal successors, (3245), 996 states have internal predecessors, (3245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 997 states to 997 states and 3245 transitions. [2022-03-01 17:32:14,723 INFO L78 Accepts]: Start accepts. Automaton has 997 states and 3245 transitions. Word has length 24 [2022-03-01 17:32:14,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:14,723 INFO L470 AbstractCegarLoop]: Abstraction has 997 states and 3245 transitions. [2022-03-01 17:32:14,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:14,723 INFO L276 IsEmpty]: Start isEmpty. Operand 997 states and 3245 transitions. [2022-03-01 17:32:14,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:14,724 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:14,724 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:14,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-03-01 17:32:14,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:14,926 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:14,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:14,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1726680669, now seen corresponding path program 116 times [2022-03-01 17:32:14,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:14,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459918990] [2022-03-01 17:32:14,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:14,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:15,138 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:15,138 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:15,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459918990] [2022-03-01 17:32:15,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459918990] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:15,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539036530] [2022-03-01 17:32:15,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:32:15,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:15,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:15,139 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:15,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-01 17:32:15,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:32:15,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:15,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:15,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:15,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:32:15,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:32:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:15,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:15,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:15,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 47 [2022-03-01 17:32:15,925 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:15,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:15,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539036530] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:15,931 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:15,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:32:15,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046004978] [2022-03-01 17:32:15,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:15,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:32:15,931 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:15,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:32:15,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:32:15,932 INFO L87 Difference]: Start difference. First operand 997 states and 3245 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:16,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:16,579 INFO L93 Difference]: Finished difference Result 1379 states and 4331 transitions. [2022-03-01 17:32:16,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:32:16,579 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:16,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:16,582 INFO L225 Difference]: With dead ends: 1379 [2022-03-01 17:32:16,582 INFO L226 Difference]: Without dead ends: 1292 [2022-03-01 17:32:16,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:32:16,582 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 130 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:16,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 269 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:32:16,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2022-03-01 17:32:16,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1004. [2022-03-01 17:32:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1004 states, 1003 states have (on average 3.2562313060817547) internal successors, (3266), 1003 states have internal predecessors, (3266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:16,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 3266 transitions. [2022-03-01 17:32:16,595 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 3266 transitions. Word has length 24 [2022-03-01 17:32:16,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:16,595 INFO L470 AbstractCegarLoop]: Abstraction has 1004 states and 3266 transitions. [2022-03-01 17:32:16,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:16,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 3266 transitions. [2022-03-01 17:32:16,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:16,596 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:16,596 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:16,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-01 17:32:16,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:16,797 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:16,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:16,797 INFO L85 PathProgramCache]: Analyzing trace with hash -337223599, now seen corresponding path program 117 times [2022-03-01 17:32:16,797 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:16,797 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700524056] [2022-03-01 17:32:16,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:16,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:16,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:16,941 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:16,941 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:16,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700524056] [2022-03-01 17:32:16,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700524056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:16,941 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432775614] [2022-03-01 17:32:16,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:32:16,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:16,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:16,942 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:16,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-01 17:32:16,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:32:16,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:16,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:16,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:17,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:32:17,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:32:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:17,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:17,562 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:17,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:32:17,742 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:17,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:17,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:17,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432775614] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:17,748 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:17,748 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:32:17,748 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058098690] [2022-03-01 17:32:17,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:17,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:32:17,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:17,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:32:17,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:32:17,749 INFO L87 Difference]: Start difference. First operand 1004 states and 3266 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:18,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:18,162 INFO L93 Difference]: Finished difference Result 1164 states and 3738 transitions. [2022-03-01 17:32:18,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:32:18,162 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:18,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:18,164 INFO L225 Difference]: With dead ends: 1164 [2022-03-01 17:32:18,164 INFO L226 Difference]: Without dead ends: 1133 [2022-03-01 17:32:18,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:32:18,164 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 105 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:18,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 194 Invalid, 723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:32:18,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133 states. [2022-03-01 17:32:18,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133 to 1011. [2022-03-01 17:32:18,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 3.2544554455445542) internal successors, (3287), 1010 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:18,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3287 transitions. [2022-03-01 17:32:18,176 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3287 transitions. Word has length 24 [2022-03-01 17:32:18,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:18,176 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 3287 transitions. [2022-03-01 17:32:18,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:18,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3287 transitions. [2022-03-01 17:32:18,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:18,177 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:18,178 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:18,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-01 17:32:18,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:18,378 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:18,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:18,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1742070229, now seen corresponding path program 118 times [2022-03-01 17:32:18,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:18,379 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62879597] [2022-03-01 17:32:18,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:18,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:18,546 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:18,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:18,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62879597] [2022-03-01 17:32:18,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62879597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:18,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215925813] [2022-03-01 17:32:18,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:32:18,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:18,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:18,548 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:18,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-01 17:32:18,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:32:18,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:18,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:18,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:18,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:32:18,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:32:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:18,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:19,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:19,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:32:19,431 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:19,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:19,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215925813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:19,437 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:19,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:32:19,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732987029] [2022-03-01 17:32:19,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:19,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:32:19,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:19,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:32:19,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:32:19,438 INFO L87 Difference]: Start difference. First operand 1011 states and 3287 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:19,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:19,798 INFO L93 Difference]: Finished difference Result 1178 states and 3773 transitions. [2022-03-01 17:32:19,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:32:19,798 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:19,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:19,800 INFO L225 Difference]: With dead ends: 1178 [2022-03-01 17:32:19,800 INFO L226 Difference]: Without dead ends: 1147 [2022-03-01 17:32:19,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:19,801 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 135 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:19,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 177 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:32:19,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2022-03-01 17:32:19,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1011. [2022-03-01 17:32:19,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 3.2544554455445542) internal successors, (3287), 1010 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3287 transitions. [2022-03-01 17:32:19,813 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3287 transitions. Word has length 24 [2022-03-01 17:32:19,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:19,813 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 3287 transitions. [2022-03-01 17:32:19,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:19,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3287 transitions. [2022-03-01 17:32:19,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:19,814 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:19,814 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:19,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-01 17:32:20,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-01 17:32:20,015 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:20,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:20,015 INFO L85 PathProgramCache]: Analyzing trace with hash -406726307, now seen corresponding path program 119 times [2022-03-01 17:32:20,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:20,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319900394] [2022-03-01 17:32:20,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:20,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:20,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:20,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:20,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319900394] [2022-03-01 17:32:20,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319900394] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:20,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121414435] [2022-03-01 17:32:20,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:32:20,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:20,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:20,160 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:20,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-01 17:32:20,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:32:20,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:20,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:20,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:20,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:32:20,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:32:20,434 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:20,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:20,794 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:20,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 74 [2022-03-01 17:32:20,973 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:20,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:20,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:20,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121414435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:20,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:20,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:32:20,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072083805] [2022-03-01 17:32:20,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:20,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:32:20,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:20,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:32:20,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:32:20,980 INFO L87 Difference]: Start difference. First operand 1011 states and 3287 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:21,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:21,338 INFO L93 Difference]: Finished difference Result 1165 states and 3740 transitions. [2022-03-01 17:32:21,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:32:21,339 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:21,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:21,340 INFO L225 Difference]: With dead ends: 1165 [2022-03-01 17:32:21,340 INFO L226 Difference]: Without dead ends: 1134 [2022-03-01 17:32:21,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:32:21,341 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 121 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:21,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 171 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:32:21,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2022-03-01 17:32:21,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 1011. [2022-03-01 17:32:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 1010 states have (on average 3.2544554455445542) internal successors, (3287), 1010 states have internal predecessors, (3287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 3287 transitions. [2022-03-01 17:32:21,353 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 3287 transitions. Word has length 24 [2022-03-01 17:32:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:21,353 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 3287 transitions. [2022-03-01 17:32:21,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:21,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 3287 transitions. [2022-03-01 17:32:21,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:21,354 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:21,354 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:21,370 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-01 17:32:21,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-01 17:32:21,555 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:21,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:21,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1503270689, now seen corresponding path program 120 times [2022-03-01 17:32:21,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:21,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23599415] [2022-03-01 17:32:21,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:21,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:21,757 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:21,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23599415] [2022-03-01 17:32:21,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23599415] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:21,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588728409] [2022-03-01 17:32:21,757 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:32:21,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:21,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:21,759 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:21,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-01 17:32:21,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:32:21,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:21,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:21,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:21,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:32:22,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:32:22,057 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:22,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:22,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:22,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-03-01 17:32:22,683 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:22,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:22,689 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588728409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:22,689 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:22,689 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:32:22,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663192495] [2022-03-01 17:32:22,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:22,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:22,690 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:22,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:22,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:22,690 INFO L87 Difference]: Start difference. First operand 1011 states and 3287 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:24,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:24,080 INFO L93 Difference]: Finished difference Result 1438 states and 4499 transitions. [2022-03-01 17:32:24,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:32:24,080 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:24,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:24,082 INFO L225 Difference]: With dead ends: 1438 [2022-03-01 17:32:24,082 INFO L226 Difference]: Without dead ends: 1325 [2022-03-01 17:32:24,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:32:24,083 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 138 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:24,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 317 Invalid, 1163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:32:24,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2022-03-01 17:32:24,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1025. [2022-03-01 17:32:24,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1025 states, 1024 states have (on average 3.2626953125) internal successors, (3341), 1024 states have internal predecessors, (3341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:24,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1025 states to 1025 states and 3341 transitions. [2022-03-01 17:32:24,107 INFO L78 Accepts]: Start accepts. Automaton has 1025 states and 3341 transitions. Word has length 24 [2022-03-01 17:32:24,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:24,107 INFO L470 AbstractCegarLoop]: Abstraction has 1025 states and 3341 transitions. [2022-03-01 17:32:24,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:24,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1025 states and 3341 transitions. [2022-03-01 17:32:24,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:24,108 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:24,109 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:24,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2022-03-01 17:32:24,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-01 17:32:24,309 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:24,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:24,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1627763433, now seen corresponding path program 121 times [2022-03-01 17:32:24,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:24,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177253824] [2022-03-01 17:32:24,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:24,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:24,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:24,487 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:24,487 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177253824] [2022-03-01 17:32:24,487 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177253824] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:24,488 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066088740] [2022-03-01 17:32:24,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:32:24,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:24,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:24,489 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:24,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-01 17:32:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:24,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:24,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:24,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:24,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:32:24,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:24,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:32:24,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:24,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:25,465 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:25,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:32:25,639 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:25,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:25,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066088740] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:25,648 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:25,648 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:32:25,648 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504306281] [2022-03-01 17:32:25,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:25,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:32:25,649 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:25,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:32:25,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:32:25,649 INFO L87 Difference]: Start difference. First operand 1025 states and 3341 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:25,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:25,844 INFO L93 Difference]: Finished difference Result 1157 states and 3724 transitions. [2022-03-01 17:32:25,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:32:25,844 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:25,846 INFO L225 Difference]: With dead ends: 1157 [2022-03-01 17:32:25,846 INFO L226 Difference]: Without dead ends: 1122 [2022-03-01 17:32:25,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:32:25,846 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 41 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:25,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 166 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 423 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-03-01 17:32:25,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2022-03-01 17:32:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1029. [2022-03-01 17:32:25,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 3.262645914396887) internal successors, (3354), 1028 states have internal predecessors, (3354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:25,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3354 transitions. [2022-03-01 17:32:25,858 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3354 transitions. Word has length 24 [2022-03-01 17:32:25,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:25,858 INFO L470 AbstractCegarLoop]: Abstraction has 1029 states and 3354 transitions. [2022-03-01 17:32:25,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:25,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3354 transitions. [2022-03-01 17:32:25,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:25,859 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:25,859 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:25,876 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2022-03-01 17:32:26,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-01 17:32:26,060 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:26,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:26,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1592590305, now seen corresponding path program 122 times [2022-03-01 17:32:26,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:26,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382458140] [2022-03-01 17:32:26,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:26,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:26,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:26,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:26,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:26,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382458140] [2022-03-01 17:32:26,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382458140] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:26,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869282950] [2022-03-01 17:32:26,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:32:26,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:26,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:26,256 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:26,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-01 17:32:26,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:32:26,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:26,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:26,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:26,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:26,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:32:26,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:26,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:32:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:26,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:27,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:27,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 72 [2022-03-01 17:32:27,409 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:27,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:27,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869282950] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:27,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:27,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:32:27,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912950764] [2022-03-01 17:32:27,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:27,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:27,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:27,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:27,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:27,418 INFO L87 Difference]: Start difference. First operand 1029 states and 3354 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:27,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:27,979 INFO L93 Difference]: Finished difference Result 1284 states and 4062 transitions. [2022-03-01 17:32:27,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:32:27,979 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:27,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:27,981 INFO L225 Difference]: With dead ends: 1284 [2022-03-01 17:32:27,981 INFO L226 Difference]: Without dead ends: 1177 [2022-03-01 17:32:27,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=141, Invalid=915, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:32:27,981 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 160 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 212 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:27,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 207 Invalid, 796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 554 Invalid, 0 Unknown, 212 Unchecked, 0.2s Time] [2022-03-01 17:32:27,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2022-03-01 17:32:27,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1046. [2022-03-01 17:32:27,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 3.2803827751196173) internal successors, (3428), 1045 states have internal predecessors, (3428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:27,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3428 transitions. [2022-03-01 17:32:27,994 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3428 transitions. Word has length 24 [2022-03-01 17:32:27,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:27,994 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 3428 transitions. [2022-03-01 17:32:27,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:27,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3428 transitions. [2022-03-01 17:32:27,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:27,996 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:27,996 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:28,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-01 17:32:28,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:28,196 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:28,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:28,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1344090349, now seen corresponding path program 123 times [2022-03-01 17:32:28,197 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:28,197 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497100717] [2022-03-01 17:32:28,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:28,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:28,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:28,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:28,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497100717] [2022-03-01 17:32:28,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497100717] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:28,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721142885] [2022-03-01 17:32:28,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:32:28,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:28,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:28,439 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:28,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-01 17:32:28,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:32:28,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:28,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:28,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:28,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:28,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:32:28,675 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:28,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:32:28,901 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:28,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:29,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:29,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-03-01 17:32:29,755 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:29,755 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:29,763 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721142885] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:29,763 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:29,763 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:32:29,764 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631944721] [2022-03-01 17:32:29,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:29,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:29,764 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:29,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:29,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:29,764 INFO L87 Difference]: Start difference. First operand 1046 states and 3428 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:30,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:30,046 INFO L93 Difference]: Finished difference Result 1121 states and 3652 transitions. [2022-03-01 17:32:30,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:32:30,047 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:30,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:30,048 INFO L225 Difference]: With dead ends: 1121 [2022-03-01 17:32:30,049 INFO L226 Difference]: Without dead ends: 1090 [2022-03-01 17:32:30,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:32:30,049 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 50 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:30,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 190 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 334 Invalid, 0 Unknown, 279 Unchecked, 0.1s Time] [2022-03-01 17:32:30,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2022-03-01 17:32:30,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 1047. [2022-03-01 17:32:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.2820267686424476) internal successors, (3433), 1046 states have internal predecessors, (3433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:30,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3433 transitions. [2022-03-01 17:32:30,061 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3433 transitions. Word has length 24 [2022-03-01 17:32:30,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:30,061 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3433 transitions. [2022-03-01 17:32:30,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:30,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3433 transitions. [2022-03-01 17:32:30,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:30,062 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:30,062 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:30,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-03-01 17:32:30,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:30,263 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:30,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:30,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1786434683, now seen corresponding path program 124 times [2022-03-01 17:32:30,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:30,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136847494] [2022-03-01 17:32:30,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:30,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:30,493 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:30,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:30,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136847494] [2022-03-01 17:32:30,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136847494] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:30,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11558401] [2022-03-01 17:32:30,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:32:30,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:30,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:30,495 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:30,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-01 17:32:30,523 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:32:30,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:30,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:32:30,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:30,673 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:30,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:32:30,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:30,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:32:30,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:30,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:31,533 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:31,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-03-01 17:32:31,728 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:31,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:32:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:31,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11558401] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:31,736 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:31,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-01 17:32:31,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692589149] [2022-03-01 17:32:31,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:31,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:32:31,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:31,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:32:31,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:32:31,737 INFO L87 Difference]: Start difference. First operand 1047 states and 3433 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:32,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:32,092 INFO L93 Difference]: Finished difference Result 1126 states and 3649 transitions. [2022-03-01 17:32:32,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:32:32,092 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:32,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:32,094 INFO L225 Difference]: With dead ends: 1126 [2022-03-01 17:32:32,094 INFO L226 Difference]: Without dead ends: 1091 [2022-03-01 17:32:32,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:32:32,095 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 47 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 355 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:32,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 284 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 527 Invalid, 0 Unknown, 355 Unchecked, 0.2s Time] [2022-03-01 17:32:32,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2022-03-01 17:32:32,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 1047. [2022-03-01 17:32:32,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.2820267686424476) internal successors, (3433), 1046 states have internal predecessors, (3433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:32,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3433 transitions. [2022-03-01 17:32:32,106 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3433 transitions. Word has length 24 [2022-03-01 17:32:32,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:32,106 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3433 transitions. [2022-03-01 17:32:32,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3433 transitions. [2022-03-01 17:32:32,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:32,108 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:32,108 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:32,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-03-01 17:32:32,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2022-03-01 17:32:32,308 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:32,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:32,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1852451543, now seen corresponding path program 125 times [2022-03-01 17:32:32,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:32,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904567690] [2022-03-01 17:32:32,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:32,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:32,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:32,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:32,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904567690] [2022-03-01 17:32:32,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904567690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:32,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132009624] [2022-03-01 17:32:32,515 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:32:32,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:32,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:32,516 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:32,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-01 17:32:32,545 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:32:32,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:32,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:32,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:32,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:32,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:32:32,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:32,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:32:32,951 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:32,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:33,638 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:33,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 74 [2022-03-01 17:32:33,777 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:33,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:33,785 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132009624] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:33,786 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:33,786 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:32:33,786 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150863757] [2022-03-01 17:32:33,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:33,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:33,786 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:33,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:33,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:33,786 INFO L87 Difference]: Start difference. First operand 1047 states and 3433 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:34,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:34,199 INFO L93 Difference]: Finished difference Result 1233 states and 3931 transitions. [2022-03-01 17:32:34,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:32:34,199 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:34,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:34,201 INFO L225 Difference]: With dead ends: 1233 [2022-03-01 17:32:34,201 INFO L226 Difference]: Without dead ends: 1153 [2022-03-01 17:32:34,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=753, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:32:34,201 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:34,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 241 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 600 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-03-01 17:32:34,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1153 states. [2022-03-01 17:32:34,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1153 to 1047. [2022-03-01 17:32:34,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1047 states, 1046 states have (on average 3.2820267686424476) internal successors, (3433), 1046 states have internal predecessors, (3433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:34,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1047 states to 1047 states and 3433 transitions. [2022-03-01 17:32:34,213 INFO L78 Accepts]: Start accepts. Automaton has 1047 states and 3433 transitions. Word has length 24 [2022-03-01 17:32:34,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:34,213 INFO L470 AbstractCegarLoop]: Abstraction has 1047 states and 3433 transitions. [2022-03-01 17:32:34,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:34,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1047 states and 3433 transitions. [2022-03-01 17:32:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:34,215 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:34,215 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:34,231 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-01 17:32:34,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:34,417 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:34,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:34,417 INFO L85 PathProgramCache]: Analyzing trace with hash 146839819, now seen corresponding path program 126 times [2022-03-01 17:32:34,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:34,418 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392808251] [2022-03-01 17:32:34,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:34,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:34,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:34,578 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:34,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392808251] [2022-03-01 17:32:34,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392808251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:34,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126066626] [2022-03-01 17:32:34,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:32:34,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:34,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:34,580 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:34,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-01 17:32:34,611 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:32:34,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:34,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:34,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:34,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:34,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:32:34,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:32:34,844 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:34,844 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:32:34,970 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:34,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:35,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:35,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-03-01 17:32:35,629 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:35,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:35,638 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:35,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126066626] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:35,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:35,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:32:35,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400600999] [2022-03-01 17:32:35,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:35,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:32:35,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:35,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:32:35,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:32:35,639 INFO L87 Difference]: Start difference. First operand 1047 states and 3433 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:35,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:35,904 INFO L93 Difference]: Finished difference Result 1223 states and 3920 transitions. [2022-03-01 17:32:35,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:32:35,904 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:35,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:35,906 INFO L225 Difference]: With dead ends: 1223 [2022-03-01 17:32:35,906 INFO L226 Difference]: Without dead ends: 1162 [2022-03-01 17:32:35,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:32:35,906 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:35,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 231 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 417 Invalid, 0 Unknown, 264 Unchecked, 0.2s Time] [2022-03-01 17:32:35,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2022-03-01 17:32:35,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1066. [2022-03-01 17:32:35,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 1065 states have (on average 3.2854460093896716) internal successors, (3499), 1065 states have internal predecessors, (3499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:35,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 3499 transitions. [2022-03-01 17:32:35,918 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 3499 transitions. Word has length 24 [2022-03-01 17:32:35,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:35,918 INFO L470 AbstractCegarLoop]: Abstraction has 1066 states and 3499 transitions. [2022-03-01 17:32:35,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:35,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 3499 transitions. [2022-03-01 17:32:35,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:35,920 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:35,920 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:35,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-01 17:32:36,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:36,121 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:36,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:36,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1997864623, now seen corresponding path program 127 times [2022-03-01 17:32:36,122 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:36,122 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228790709] [2022-03-01 17:32:36,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:36,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:36,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:36,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:36,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228790709] [2022-03-01 17:32:36,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228790709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:36,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327147385] [2022-03-01 17:32:36,322 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:32:36,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:36,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:36,323 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:36,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-01 17:32:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:36,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:32:36,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:36,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:32:36,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:32:36,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:36,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:37,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:37,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-03-01 17:32:37,513 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:37,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:32:37,519 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:37,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327147385] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:37,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:37,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:32:37,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508441983] [2022-03-01 17:32:37,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:37,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:37,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:37,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:37,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:37,520 INFO L87 Difference]: Start difference. First operand 1066 states and 3499 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:38,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:38,934 INFO L93 Difference]: Finished difference Result 1662 states and 5085 transitions. [2022-03-01 17:32:38,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:32:38,935 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:38,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:38,937 INFO L225 Difference]: With dead ends: 1662 [2022-03-01 17:32:38,937 INFO L226 Difference]: Without dead ends: 1515 [2022-03-01 17:32:38,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=197, Invalid=1063, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:32:38,938 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 146 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:38,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 360 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:32:38,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2022-03-01 17:32:38,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1080. [2022-03-01 17:32:38,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1079 states have (on average 3.2863762743280818) internal successors, (3546), 1079 states have internal predecessors, (3546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:38,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 3546 transitions. [2022-03-01 17:32:38,952 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 3546 transitions. Word has length 24 [2022-03-01 17:32:38,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:38,953 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 3546 transitions. [2022-03-01 17:32:38,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:38,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 3546 transitions. [2022-03-01 17:32:38,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:38,954 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:38,954 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:38,976 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-01 17:32:39,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:39,167 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:39,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:39,168 INFO L85 PathProgramCache]: Analyzing trace with hash 372229527, now seen corresponding path program 128 times [2022-03-01 17:32:39,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:39,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104660052] [2022-03-01 17:32:39,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:39,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:39,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:39,343 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:39,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104660052] [2022-03-01 17:32:39,343 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104660052] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:39,343 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416687707] [2022-03-01 17:32:39,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:32:39,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:39,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:39,345 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:39,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-01 17:32:39,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:32:39,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:39,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:39,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:39,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-01 17:32:39,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:32:39,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:39,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:40,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:40,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-03-01 17:32:40,344 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:40,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:32:40,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:40,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416687707] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:40,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:40,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:32:40,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399342465] [2022-03-01 17:32:40,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:40,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:32:40,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:40,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:32:40,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:32:40,350 INFO L87 Difference]: Start difference. First operand 1080 states and 3546 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:40,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:40,791 INFO L93 Difference]: Finished difference Result 1339 states and 4278 transitions. [2022-03-01 17:32:40,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:32:40,791 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:40,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:40,793 INFO L225 Difference]: With dead ends: 1339 [2022-03-01 17:32:40,793 INFO L226 Difference]: Without dead ends: 1277 [2022-03-01 17:32:40,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:32:40,794 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 129 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:40,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 254 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:32:40,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2022-03-01 17:32:40,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1074. [2022-03-01 17:32:40,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1074 states, 1073 states have (on average 3.287977632805219) internal successors, (3528), 1073 states have internal predecessors, (3528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:40,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1074 states to 1074 states and 3528 transitions. [2022-03-01 17:32:40,808 INFO L78 Accepts]: Start accepts. Automaton has 1074 states and 3528 transitions. Word has length 24 [2022-03-01 17:32:40,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:40,808 INFO L470 AbstractCegarLoop]: Abstraction has 1074 states and 3528 transitions. [2022-03-01 17:32:40,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:40,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1074 states and 3528 transitions. [2022-03-01 17:32:40,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:40,810 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:40,810 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:40,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2022-03-01 17:32:41,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:41,023 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:41,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:41,024 INFO L85 PathProgramCache]: Analyzing trace with hash -209531253, now seen corresponding path program 129 times [2022-03-01 17:32:41,024 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:41,024 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494469748] [2022-03-01 17:32:41,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:41,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:41,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:41,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:41,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494469748] [2022-03-01 17:32:41,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494469748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:41,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473250736] [2022-03-01 17:32:41,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:32:41,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:41,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:41,250 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:41,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-01 17:32:41,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:32:41,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:41,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:41,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:41,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:41,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:32:41,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:41,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:32:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:41,726 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:42,394 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:42,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-03-01 17:32:42,567 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:42,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:42,575 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473250736] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:42,575 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:42,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:32:42,576 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462950028] [2022-03-01 17:32:42,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:42,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:42,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:42,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:42,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:42,576 INFO L87 Difference]: Start difference. First operand 1074 states and 3528 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:42,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:42,825 INFO L93 Difference]: Finished difference Result 1248 states and 4016 transitions. [2022-03-01 17:32:42,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:32:42,825 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:42,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:42,827 INFO L225 Difference]: With dead ends: 1248 [2022-03-01 17:32:42,827 INFO L226 Difference]: Without dead ends: 1182 [2022-03-01 17:32:42,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:32:42,828 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 67 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:42,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 221 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 333 Invalid, 0 Unknown, 141 Unchecked, 0.1s Time] [2022-03-01 17:32:42,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2022-03-01 17:32:42,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1075. [2022-03-01 17:32:42,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1074 states have (on average 3.288640595903166) internal successors, (3532), 1074 states have internal predecessors, (3532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:42,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 3532 transitions. [2022-03-01 17:32:42,853 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 3532 transitions. Word has length 24 [2022-03-01 17:32:42,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:42,854 INFO L470 AbstractCegarLoop]: Abstraction has 1075 states and 3532 transitions. [2022-03-01 17:32:42,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:42,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 3532 transitions. [2022-03-01 17:32:42,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:42,855 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:42,855 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:42,871 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-03-01 17:32:43,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2022-03-01 17:32:43,056 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:43,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:43,056 INFO L85 PathProgramCache]: Analyzing trace with hash -325051967, now seen corresponding path program 130 times [2022-03-01 17:32:43,056 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:43,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986577266] [2022-03-01 17:32:43,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:43,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:43,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:43,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:43,245 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:43,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986577266] [2022-03-01 17:32:43,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986577266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:43,245 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137070708] [2022-03-01 17:32:43,245 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:32:43,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:43,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:43,247 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:43,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-01 17:32:43,274 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:32:43,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:43,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:43,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:43,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:43,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:32:43,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:43,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:32:43,676 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:43,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:44,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:44,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-03-01 17:32:44,543 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:44,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:44,552 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:44,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137070708] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:44,552 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:44,552 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:32:44,552 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196595236] [2022-03-01 17:32:44,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:44,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:44,552 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:44,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:44,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:44,553 INFO L87 Difference]: Start difference. First operand 1075 states and 3532 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:44,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:44,743 INFO L93 Difference]: Finished difference Result 1154 states and 3772 transitions. [2022-03-01 17:32:44,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:32:44,743 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:44,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:44,745 INFO L225 Difference]: With dead ends: 1154 [2022-03-01 17:32:44,745 INFO L226 Difference]: Without dead ends: 1123 [2022-03-01 17:32:44,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:32:44,745 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 61 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 235 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:44,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 170 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 336 Invalid, 0 Unknown, 235 Unchecked, 0.1s Time] [2022-03-01 17:32:44,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-03-01 17:32:44,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 1083. [2022-03-01 17:32:44,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 3.2939001848428835) internal successors, (3564), 1082 states have internal predecessors, (3564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:44,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 3564 transitions. [2022-03-01 17:32:44,758 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 3564 transitions. Word has length 24 [2022-03-01 17:32:44,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:44,758 INFO L470 AbstractCegarLoop]: Abstraction has 1083 states and 3564 transitions. [2022-03-01 17:32:44,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:44,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 3564 transitions. [2022-03-01 17:32:44,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:44,759 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:44,759 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:44,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-01 17:32:44,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-03-01 17:32:44,960 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:44,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:44,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1873616141, now seen corresponding path program 131 times [2022-03-01 17:32:44,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:44,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057985369] [2022-03-01 17:32:44,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:44,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:45,170 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:45,170 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:45,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057985369] [2022-03-01 17:32:45,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057985369] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:45,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392423701] [2022-03-01 17:32:45,171 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:32:45,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:45,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:45,172 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:45,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-01 17:32:45,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:32:45,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:45,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:45,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:45,340 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:45,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:32:45,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:32:45,501 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:45,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-01 17:32:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:45,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:46,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:46,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 71 [2022-03-01 17:32:46,238 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:46,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:46,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392423701] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:46,246 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:46,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:32:46,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646875015] [2022-03-01 17:32:46,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:46,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:46,246 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:46,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:46,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:46,247 INFO L87 Difference]: Start difference. First operand 1083 states and 3564 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:46,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:46,515 INFO L93 Difference]: Finished difference Result 1168 states and 3794 transitions. [2022-03-01 17:32:46,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:32:46,516 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:46,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:46,517 INFO L225 Difference]: With dead ends: 1168 [2022-03-01 17:32:46,517 INFO L226 Difference]: Without dead ends: 1137 [2022-03-01 17:32:46,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:32:46,518 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 38 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:46,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 268 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 413 Invalid, 0 Unknown, 278 Unchecked, 0.2s Time] [2022-03-01 17:32:46,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-03-01 17:32:46,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1111. [2022-03-01 17:32:46,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1110 states have (on average 3.2756756756756755) internal successors, (3636), 1110 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:46,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3636 transitions. [2022-03-01 17:32:46,530 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3636 transitions. Word has length 24 [2022-03-01 17:32:46,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:46,530 INFO L470 AbstractCegarLoop]: Abstraction has 1111 states and 3636 transitions. [2022-03-01 17:32:46,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:46,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3636 transitions. [2022-03-01 17:32:46,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:46,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:46,532 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:46,547 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Ended with exit code 0 [2022-03-01 17:32:46,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-03-01 17:32:46,732 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:46,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:46,732 INFO L85 PathProgramCache]: Analyzing trace with hash 876985715, now seen corresponding path program 132 times [2022-03-01 17:32:46,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:46,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708073495] [2022-03-01 17:32:46,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:46,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:46,933 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:46,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708073495] [2022-03-01 17:32:46,933 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708073495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:46,933 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857701961] [2022-03-01 17:32:46,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:32:46,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:46,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:46,934 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:46,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-01 17:32:46,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:32:46,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:46,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:46,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:47,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:47,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:32:47,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:32:47,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:47,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-01 17:32:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:47,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:47,946 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:47,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2022-03-01 17:32:48,070 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:48,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:48,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857701961] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:48,079 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:48,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:32:48,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214933705] [2022-03-01 17:32:48,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:48,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:48,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:48,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:48,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:48,080 INFO L87 Difference]: Start difference. First operand 1111 states and 3636 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:48,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:48,275 INFO L93 Difference]: Finished difference Result 1189 states and 3847 transitions. [2022-03-01 17:32:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:32:48,276 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:48,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:48,277 INFO L225 Difference]: With dead ends: 1189 [2022-03-01 17:32:48,277 INFO L226 Difference]: Without dead ends: 1186 [2022-03-01 17:32:48,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:32:48,278 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 75 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 329 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:48,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 200 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 219 Invalid, 0 Unknown, 329 Unchecked, 0.1s Time] [2022-03-01 17:32:48,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2022-03-01 17:32:48,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 1120. [2022-03-01 17:32:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 3.2725647899910633) internal successors, (3662), 1119 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:48,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 3662 transitions. [2022-03-01 17:32:48,290 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 3662 transitions. Word has length 24 [2022-03-01 17:32:48,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:48,290 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 3662 transitions. [2022-03-01 17:32:48,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:48,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 3662 transitions. [2022-03-01 17:32:48,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:48,292 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:48,292 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:48,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Forceful destruction successful, exit code 0 [2022-03-01 17:32:48,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-01 17:32:48,492 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:48,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:48,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1291302493, now seen corresponding path program 133 times [2022-03-01 17:32:48,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:48,493 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772254128] [2022-03-01 17:32:48,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:48,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:48,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:48,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:48,644 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:48,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772254128] [2022-03-01 17:32:48,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772254128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:48,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799923380] [2022-03-01 17:32:48,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:32:48,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:48,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:48,646 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:48,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-01 17:32:48,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:48,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:48,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:48,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:32:48,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:32:48,938 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:32:48,995 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:48,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:49,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:49,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:32:49,825 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:49,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:49,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799923380] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:49,831 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:49,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:32:49,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121819507] [2022-03-01 17:32:49,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:49,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:49,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:49,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:49,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:49,831 INFO L87 Difference]: Start difference. First operand 1120 states and 3662 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:50,720 INFO L93 Difference]: Finished difference Result 1416 states and 4501 transitions. [2022-03-01 17:32:50,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:32:50,720 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:50,722 INFO L225 Difference]: With dead ends: 1416 [2022-03-01 17:32:50,723 INFO L226 Difference]: Without dead ends: 1358 [2022-03-01 17:32:50,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=210, Invalid=1122, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:32:50,723 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 145 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:50,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 262 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 929 Invalid, 0 Unknown, 72 Unchecked, 0.4s Time] [2022-03-01 17:32:50,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-03-01 17:32:50,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1096. [2022-03-01 17:32:50,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 3.291324200913242) internal successors, (3604), 1095 states have internal predecessors, (3604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:50,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3604 transitions. [2022-03-01 17:32:50,736 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3604 transitions. Word has length 24 [2022-03-01 17:32:50,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:50,736 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 3604 transitions. [2022-03-01 17:32:50,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:50,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3604 transitions. [2022-03-01 17:32:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:50,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:50,738 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:50,760 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-01 17:32:50,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:50,951 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:50,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:50,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1936948385, now seen corresponding path program 134 times [2022-03-01 17:32:50,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:50,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815071489] [2022-03-01 17:32:50,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:50,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:51,167 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:51,167 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:51,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815071489] [2022-03-01 17:32:51,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815071489] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:51,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387222766] [2022-03-01 17:32:51,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:32:51,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:51,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:51,169 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:51,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-01 17:32:51,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:32:51,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:51,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:51,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:51,346 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:51,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:32:51,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:51,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:32:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:51,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:52,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:52,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:32:52,314 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:52,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:52,322 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:52,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387222766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:52,322 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:52,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:32:52,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93076214] [2022-03-01 17:32:52,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:52,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:52,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:52,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:52,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:52,323 INFO L87 Difference]: Start difference. First operand 1096 states and 3604 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:52,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:52,642 INFO L93 Difference]: Finished difference Result 1239 states and 4000 transitions. [2022-03-01 17:32:52,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:32:52,642 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:52,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:52,644 INFO L225 Difference]: With dead ends: 1239 [2022-03-01 17:32:52,644 INFO L226 Difference]: Without dead ends: 1204 [2022-03-01 17:32:52,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:32:52,644 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 55 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:52,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 238 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 557 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-03-01 17:32:52,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-03-01 17:32:52,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1096. [2022-03-01 17:32:52,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 3.291324200913242) internal successors, (3604), 1095 states have internal predecessors, (3604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 3604 transitions. [2022-03-01 17:32:52,657 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 3604 transitions. Word has length 24 [2022-03-01 17:32:52,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:52,657 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 3604 transitions. [2022-03-01 17:32:52,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:52,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 3604 transitions. [2022-03-01 17:32:52,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:52,659 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:52,659 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:52,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-01 17:32:52,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2022-03-01 17:32:52,859 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:52,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:52,860 INFO L85 PathProgramCache]: Analyzing trace with hash 658477295, now seen corresponding path program 135 times [2022-03-01 17:32:52,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:52,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143529005] [2022-03-01 17:32:52,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:52,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:53,021 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:53,021 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:53,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143529005] [2022-03-01 17:32:53,021 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143529005] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:53,021 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240324800] [2022-03-01 17:32:53,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:32:53,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:53,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:53,023 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:53,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-01 17:32:53,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:32:53,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:53,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:32:53,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:53,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:32:53,235 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:32:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:53,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:53,793 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:53,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-03-01 17:32:53,930 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:53,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:32:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:53,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240324800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:53,938 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:53,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:32:53,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462555229] [2022-03-01 17:32:53,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:53,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:32:53,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:53,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:32:53,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:32:53,939 INFO L87 Difference]: Start difference. First operand 1096 states and 3604 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:54,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:54,852 INFO L93 Difference]: Finished difference Result 1842 states and 5766 transitions. [2022-03-01 17:32:54,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:32:54,852 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:54,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:54,855 INFO L225 Difference]: With dead ends: 1842 [2022-03-01 17:32:54,855 INFO L226 Difference]: Without dead ends: 1678 [2022-03-01 17:32:54,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:32:54,855 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 218 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:54,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 238 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 658 Invalid, 0 Unknown, 182 Unchecked, 0.3s Time] [2022-03-01 17:32:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1678 states. [2022-03-01 17:32:54,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1678 to 1101. [2022-03-01 17:32:54,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 1100 states have (on average 3.290909090909091) internal successors, (3620), 1100 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:54,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 3620 transitions. [2022-03-01 17:32:54,871 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 3620 transitions. Word has length 24 [2022-03-01 17:32:54,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:54,871 INFO L470 AbstractCegarLoop]: Abstraction has 1101 states and 3620 transitions. [2022-03-01 17:32:54,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:54,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 3620 transitions. [2022-03-01 17:32:54,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:54,873 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:54,873 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:54,896 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Forceful destruction successful, exit code 0 [2022-03-01 17:32:55,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:55,095 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:55,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:55,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1834815299, now seen corresponding path program 136 times [2022-03-01 17:32:55,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:55,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091903250] [2022-03-01 17:32:55,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:55,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:55,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:55,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:55,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091903250] [2022-03-01 17:32:55,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091903250] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:55,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168164901] [2022-03-01 17:32:55,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:32:55,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:55,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:55,268 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:55,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-01 17:32:55,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:32:55,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:55,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:32:55,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:55,359 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:32:55,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:32:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:55,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:56,070 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:56,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-03-01 17:32:56,322 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:56,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:32:56,327 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:56,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168164901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:56,327 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:56,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:32:56,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861728668] [2022-03-01 17:32:56,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:56,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:32:56,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:56,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:32:56,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:32:56,328 INFO L87 Difference]: Start difference. First operand 1101 states and 3620 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:57,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:57,074 INFO L93 Difference]: Finished difference Result 1415 states and 4547 transitions. [2022-03-01 17:32:57,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:32:57,074 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:57,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:57,077 INFO L225 Difference]: With dead ends: 1415 [2022-03-01 17:32:57,077 INFO L226 Difference]: Without dead ends: 1301 [2022-03-01 17:32:57,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=821, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:32:57,077 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 143 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 985 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:57,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 267 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 985 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:32:57,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2022-03-01 17:32:57,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1128. [2022-03-01 17:32:57,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 1127 states have (on average 3.284826974267968) internal successors, (3702), 1127 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:57,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 3702 transitions. [2022-03-01 17:32:57,093 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 3702 transitions. Word has length 24 [2022-03-01 17:32:57,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:57,093 INFO L470 AbstractCegarLoop]: Abstraction has 1128 states and 3702 transitions. [2022-03-01 17:32:57,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:57,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 3702 transitions. [2022-03-01 17:32:57,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:57,095 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:57,095 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:57,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-03-01 17:32:57,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:57,309 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:57,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:57,309 INFO L85 PathProgramCache]: Analyzing trace with hash -609127193, now seen corresponding path program 137 times [2022-03-01 17:32:57,310 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:57,310 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105219214] [2022-03-01 17:32:57,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:57,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:57,463 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:57,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105219214] [2022-03-01 17:32:57,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105219214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:57,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344964294] [2022-03-01 17:32:57,463 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:32:57,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:57,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:57,464 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:57,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-01 17:32:57,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:32:57,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:57,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:57,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:57,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:32:57,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:32:57,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:57,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:58,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:58,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:32:58,596 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:58,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:32:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:32:58,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344964294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:58,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:58,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:32:58,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075110660] [2022-03-01 17:32:58,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:58,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:32:58,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:58,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:32:58,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:32:58,605 INFO L87 Difference]: Start difference. First operand 1128 states and 3702 transitions. Second operand has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:58,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:58,941 INFO L93 Difference]: Finished difference Result 1271 states and 4121 transitions. [2022-03-01 17:32:58,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:32:58,941 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:32:58,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:58,943 INFO L225 Difference]: With dead ends: 1271 [2022-03-01 17:32:58,943 INFO L226 Difference]: Without dead ends: 1256 [2022-03-01 17:32:58,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:32:58,943 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 90 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:58,943 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 224 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 619 Invalid, 0 Unknown, 121 Unchecked, 0.3s Time] [2022-03-01 17:32:58,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2022-03-01 17:32:58,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1130. [2022-03-01 17:32:58,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 3.2931798051372896) internal successors, (3718), 1129 states have internal predecessors, (3718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:58,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 3718 transitions. [2022-03-01 17:32:58,956 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 3718 transitions. Word has length 24 [2022-03-01 17:32:58,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:58,956 INFO L470 AbstractCegarLoop]: Abstraction has 1130 states and 3718 transitions. [2022-03-01 17:32:58,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3636363636363638) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:58,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 3718 transitions. [2022-03-01 17:32:58,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:32:58,957 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:58,958 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:58,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Forceful destruction successful, exit code 0 [2022-03-01 17:32:59,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:59,158 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:32:59,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:59,158 INFO L85 PathProgramCache]: Analyzing trace with hash -632028281, now seen corresponding path program 138 times [2022-03-01 17:32:59,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:59,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152832408] [2022-03-01 17:32:59,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:59,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:59,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:32:59,337 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:59,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152832408] [2022-03-01 17:32:59,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152832408] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:59,337 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758957917] [2022-03-01 17:32:59,337 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:32:59,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:59,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:59,338 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:59,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-01 17:32:59,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:32:59,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:59,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:32:59,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:59,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:32:59,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:32:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:32:59,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:00,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:00,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 72 [2022-03-01 17:33:00,327 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:00,327 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:33:00,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758957917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:00,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:00,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:33:00,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227192135] [2022-03-01 17:33:00,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:00,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:33:00,336 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:00,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:33:00,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:33:00,336 INFO L87 Difference]: Start difference. First operand 1130 states and 3718 transitions. Second operand has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:00,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:00,746 INFO L93 Difference]: Finished difference Result 1837 states and 5910 transitions. [2022-03-01 17:33:00,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:33:00,746 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:00,749 INFO L225 Difference]: With dead ends: 1837 [2022-03-01 17:33:00,749 INFO L226 Difference]: Without dead ends: 1806 [2022-03-01 17:33:00,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:33:00,749 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 80 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:00,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 249 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 756 Invalid, 0 Unknown, 77 Unchecked, 0.3s Time] [2022-03-01 17:33:00,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1806 states. [2022-03-01 17:33:00,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1806 to 1147. [2022-03-01 17:33:00,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1147 states, 1146 states have (on average 3.2923211169284468) internal successors, (3773), 1146 states have internal predecessors, (3773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:00,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1147 states to 1147 states and 3773 transitions. [2022-03-01 17:33:00,764 INFO L78 Accepts]: Start accepts. Automaton has 1147 states and 3773 transitions. Word has length 24 [2022-03-01 17:33:00,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:00,764 INFO L470 AbstractCegarLoop]: Abstraction has 1147 states and 3773 transitions. [2022-03-01 17:33:00,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5) internal successors, (55), 22 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:00,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1147 states and 3773 transitions. [2022-03-01 17:33:00,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:00,766 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:00,766 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:00,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-01 17:33:00,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:00,967 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:00,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:00,967 INFO L85 PathProgramCache]: Analyzing trace with hash 633638735, now seen corresponding path program 139 times [2022-03-01 17:33:00,967 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:00,967 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056994803] [2022-03-01 17:33:00,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:00,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:01,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:01,148 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:01,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056994803] [2022-03-01 17:33:01,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056994803] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:01,148 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729653020] [2022-03-01 17:33:01,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:33:01,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:01,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:01,149 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:01,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-01 17:33:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:01,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:33:01,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:01,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:33:01,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:33:01,529 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:01,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:02,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:02,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-03-01 17:33:02,321 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:02,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:33:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:02,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729653020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:02,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:02,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:33:02,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555528777] [2022-03-01 17:33:02,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:02,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:33:02,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:02,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:33:02,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:33:02,330 INFO L87 Difference]: Start difference. First operand 1147 states and 3773 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:03,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:03,411 INFO L93 Difference]: Finished difference Result 1684 states and 5209 transitions. [2022-03-01 17:33:03,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:33:03,411 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:03,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:03,414 INFO L225 Difference]: With dead ends: 1684 [2022-03-01 17:33:03,414 INFO L226 Difference]: Without dead ends: 1506 [2022-03-01 17:33:03,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=236, Invalid=1024, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:33:03,414 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 261 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:03,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 289 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 849 Invalid, 0 Unknown, 174 Unchecked, 0.4s Time] [2022-03-01 17:33:03,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2022-03-01 17:33:03,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1137. [2022-03-01 17:33:03,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1137 states, 1136 states have (on average 3.296654929577465) internal successors, (3745), 1136 states have internal predecessors, (3745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:03,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1137 states to 1137 states and 3745 transitions. [2022-03-01 17:33:03,431 INFO L78 Accepts]: Start accepts. Automaton has 1137 states and 3745 transitions. Word has length 24 [2022-03-01 17:33:03,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:03,431 INFO L470 AbstractCegarLoop]: Abstraction has 1137 states and 3745 transitions. [2022-03-01 17:33:03,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:03,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1137 states and 3745 transitions. [2022-03-01 17:33:03,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:03,432 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:03,432 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:03,448 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-03-01 17:33:03,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable154 [2022-03-01 17:33:03,633 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:03,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:03,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1769998667, now seen corresponding path program 140 times [2022-03-01 17:33:03,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:03,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454025984] [2022-03-01 17:33:03,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:03,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:03,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:03,796 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:03,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454025984] [2022-03-01 17:33:03,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454025984] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:03,796 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702857899] [2022-03-01 17:33:03,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:33:03,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:03,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:03,797 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:03,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-01 17:33:03,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:33:03,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:03,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:03,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:03,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:33:03,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:33:04,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:04,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:04,384 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:04,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-03-01 17:33:04,496 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:04,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:04,501 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:04,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702857899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:04,501 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:04,501 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:33:04,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117124737] [2022-03-01 17:33:04,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:04,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:33:04,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:04,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:33:04,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:33:04,502 INFO L87 Difference]: Start difference. First operand 1137 states and 3745 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:05,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:05,058 INFO L93 Difference]: Finished difference Result 1356 states and 4374 transitions. [2022-03-01 17:33:05,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:33:05,058 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:05,060 INFO L225 Difference]: With dead ends: 1356 [2022-03-01 17:33:05,060 INFO L226 Difference]: Without dead ends: 1297 [2022-03-01 17:33:05,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:33:05,060 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 108 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:05,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 263 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1043 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:33:05,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2022-03-01 17:33:05,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1164. [2022-03-01 17:33:05,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1164 states, 1163 states have (on average 3.289767841788478) internal successors, (3826), 1163 states have internal predecessors, (3826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:05,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1164 states to 1164 states and 3826 transitions. [2022-03-01 17:33:05,074 INFO L78 Accepts]: Start accepts. Automaton has 1164 states and 3826 transitions. Word has length 24 [2022-03-01 17:33:05,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:05,074 INFO L470 AbstractCegarLoop]: Abstraction has 1164 states and 3826 transitions. [2022-03-01 17:33:05,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:05,074 INFO L276 IsEmpty]: Start isEmpty. Operand 1164 states and 3826 transitions. [2022-03-01 17:33:05,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:05,075 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:05,075 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:05,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Ended with exit code 0 [2022-03-01 17:33:05,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-03-01 17:33:05,276 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:05,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:05,276 INFO L85 PathProgramCache]: Analyzing trace with hash -445674801, now seen corresponding path program 141 times [2022-03-01 17:33:05,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:05,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581305829] [2022-03-01 17:33:05,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:05,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:05,426 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:05,427 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:05,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581305829] [2022-03-01 17:33:05,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581305829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:05,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637467044] [2022-03-01 17:33:05,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:33:05,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:05,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:05,428 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:05,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-01 17:33:05,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:33:05,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:05,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:33:05,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:05,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:33:05,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:33:05,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:05,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:06,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:06,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-03-01 17:33:06,374 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:06,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:33:06,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:06,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637467044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:06,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:06,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:33:06,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199605773] [2022-03-01 17:33:06,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:06,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:33:06,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:06,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:33:06,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:33:06,380 INFO L87 Difference]: Start difference. First operand 1164 states and 3826 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:07,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:07,515 INFO L93 Difference]: Finished difference Result 1775 states and 5459 transitions. [2022-03-01 17:33:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:33:07,515 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:07,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:07,518 INFO L225 Difference]: With dead ends: 1775 [2022-03-01 17:33:07,518 INFO L226 Difference]: Without dead ends: 1560 [2022-03-01 17:33:07,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=268, Invalid=992, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:33:07,519 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 248 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 991 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 991 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:07,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 301 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 991 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:33:07,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2022-03-01 17:33:07,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1171. [2022-03-01 17:33:07,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.288034188034188) internal successors, (3847), 1170 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:07,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3847 transitions. [2022-03-01 17:33:07,534 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3847 transitions. Word has length 24 [2022-03-01 17:33:07,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:07,534 INFO L470 AbstractCegarLoop]: Abstraction has 1171 states and 3847 transitions. [2022-03-01 17:33:07,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:07,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3847 transitions. [2022-03-01 17:33:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:07,536 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:07,536 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:07,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Ended with exit code 0 [2022-03-01 17:33:07,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:07,736 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:07,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:07,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1700495959, now seen corresponding path program 142 times [2022-03-01 17:33:07,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:07,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773202562] [2022-03-01 17:33:07,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:07,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:07,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:07,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:07,870 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:07,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773202562] [2022-03-01 17:33:07,870 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773202562] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:07,870 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416583147] [2022-03-01 17:33:07,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:33:07,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:07,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:07,871 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:07,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-01 17:33:07,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:33:07,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:07,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:33:07,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:08,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:33:08,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:33:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:08,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:08,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:08,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-03-01 17:33:08,848 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:08,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:33:08,853 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:08,853 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416583147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:08,853 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:08,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:33:08,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550001329] [2022-03-01 17:33:08,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:08,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:33:08,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:08,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:33:08,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:33:08,854 INFO L87 Difference]: Start difference. First operand 1171 states and 3847 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:10,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:10,019 INFO L93 Difference]: Finished difference Result 1623 states and 5088 transitions. [2022-03-01 17:33:10,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:33:10,020 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:10,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:10,022 INFO L225 Difference]: With dead ends: 1623 [2022-03-01 17:33:10,022 INFO L226 Difference]: Without dead ends: 1501 [2022-03-01 17:33:10,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:33:10,022 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 194 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:10,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 254 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:33:10,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2022-03-01 17:33:10,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1171. [2022-03-01 17:33:10,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1171 states, 1170 states have (on average 3.288034188034188) internal successors, (3847), 1170 states have internal predecessors, (3847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1171 states to 1171 states and 3847 transitions. [2022-03-01 17:33:10,037 INFO L78 Accepts]: Start accepts. Automaton has 1171 states and 3847 transitions. Word has length 24 [2022-03-01 17:33:10,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:10,037 INFO L470 AbstractCegarLoop]: Abstraction has 1171 states and 3847 transitions. [2022-03-01 17:33:10,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:10,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1171 states and 3847 transitions. [2022-03-01 17:33:10,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:10,039 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:10,039 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:10,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-03-01 17:33:10,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-01 17:33:10,239 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:10,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:10,240 INFO L85 PathProgramCache]: Analyzing trace with hash 606404371, now seen corresponding path program 143 times [2022-03-01 17:33:10,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:10,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950465709] [2022-03-01 17:33:10,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:10,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:10,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:10,371 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:10,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:10,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950465709] [2022-03-01 17:33:10,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950465709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:10,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93184128] [2022-03-01 17:33:10,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:33:10,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:10,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:10,373 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:10,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-01 17:33:10,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:33:10,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:10,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:10,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:10,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:33:10,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:33:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:10,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:10,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:10,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-01 17:33:11,040 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:11,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:11,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93184128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:11,045 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:11,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:33:11,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913362001] [2022-03-01 17:33:11,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:11,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:33:11,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:11,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:33:11,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:33:11,046 INFO L87 Difference]: Start difference. First operand 1171 states and 3847 transitions. Second operand has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:11,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:11,477 INFO L93 Difference]: Finished difference Result 1590 states and 5128 transitions. [2022-03-01 17:33:11,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:33:11,477 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:11,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:11,480 INFO L225 Difference]: With dead ends: 1590 [2022-03-01 17:33:11,480 INFO L226 Difference]: Without dead ends: 1559 [2022-03-01 17:33:11,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:33:11,480 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 124 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:11,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 216 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:33:11,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1559 states. [2022-03-01 17:33:11,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1559 to 1211. [2022-03-01 17:33:11,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 3.277685950413223) internal successors, (3966), 1210 states have internal predecessors, (3966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:11,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 3966 transitions. [2022-03-01 17:33:11,495 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 3966 transitions. Word has length 24 [2022-03-01 17:33:11,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:11,495 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 3966 transitions. [2022-03-01 17:33:11,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:11,496 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 3966 transitions. [2022-03-01 17:33:11,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:11,497 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:11,497 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:11,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Forceful destruction successful, exit code 0 [2022-03-01 17:33:11,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-01 17:33:11,697 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:11,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:11,698 INFO L85 PathProgramCache]: Analyzing trace with hash 892868761, now seen corresponding path program 144 times [2022-03-01 17:33:11,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:11,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29028883] [2022-03-01 17:33:11,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:11,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:11,905 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:11,905 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:11,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29028883] [2022-03-01 17:33:11,905 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29028883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:11,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847409066] [2022-03-01 17:33:11,905 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:33:11,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:11,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:11,906 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:11,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-01 17:33:11,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:33:11,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:11,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:11,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:12,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:12,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:33:12,267 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:12,268 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:33:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:12,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:12,844 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:12,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2022-03-01 17:33:12,971 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:12,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:12,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847409066] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:12,980 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:12,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:33:12,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123494584] [2022-03-01 17:33:12,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:12,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:33:12,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:12,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:33:12,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:33:12,981 INFO L87 Difference]: Start difference. First operand 1211 states and 3966 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:13,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:13,240 INFO L93 Difference]: Finished difference Result 1357 states and 4380 transitions. [2022-03-01 17:33:13,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:33:13,241 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:13,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:13,243 INFO L225 Difference]: With dead ends: 1357 [2022-03-01 17:33:13,243 INFO L226 Difference]: Without dead ends: 1298 [2022-03-01 17:33:13,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:33:13,243 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 45 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:13,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 203 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 333 Invalid, 0 Unknown, 94 Unchecked, 0.1s Time] [2022-03-01 17:33:13,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2022-03-01 17:33:13,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1214. [2022-03-01 17:33:13,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1214 states, 1213 states have (on average 3.2778235779060183) internal successors, (3976), 1213 states have internal predecessors, (3976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:13,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1214 states to 1214 states and 3976 transitions. [2022-03-01 17:33:13,256 INFO L78 Accepts]: Start accepts. Automaton has 1214 states and 3976 transitions. Word has length 24 [2022-03-01 17:33:13,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:13,256 INFO L470 AbstractCegarLoop]: Abstraction has 1214 states and 3976 transitions. [2022-03-01 17:33:13,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:13,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1214 states and 3976 transitions. [2022-03-01 17:33:13,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:13,258 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:13,258 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:13,274 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-03-01 17:33:13,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2022-03-01 17:33:13,458 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:13,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:13,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2056801935, now seen corresponding path program 145 times [2022-03-01 17:33:13,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:13,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231005850] [2022-03-01 17:33:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:13,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:13,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:13,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:13,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231005850] [2022-03-01 17:33:13,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231005850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:13,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192789208] [2022-03-01 17:33:13,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:33:13,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:13,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:13,683 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:13,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-01 17:33:13,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:13,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:13,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:13,851 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:13,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:33:13,983 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:13,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:33:14,113 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:14,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:14,657 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:14,657 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:33:14,852 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:14,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:14,860 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:14,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192789208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:14,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:14,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:33:14,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242054441] [2022-03-01 17:33:14,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:14,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:33:14,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:14,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:33:14,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:33:14,861 INFO L87 Difference]: Start difference. First operand 1214 states and 3976 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:15,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:15,100 INFO L93 Difference]: Finished difference Result 1344 states and 4348 transitions. [2022-03-01 17:33:15,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:33:15,101 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:15,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:15,112 INFO L225 Difference]: With dead ends: 1344 [2022-03-01 17:33:15,112 INFO L226 Difference]: Without dead ends: 1309 [2022-03-01 17:33:15,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:33:15,112 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 69 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:15,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 183 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 462 Invalid, 0 Unknown, 180 Unchecked, 0.2s Time] [2022-03-01 17:33:15,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1309 states. [2022-03-01 17:33:15,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1309 to 1220. [2022-03-01 17:33:15,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1220 states, 1219 states have (on average 3.276456111566858) internal successors, (3994), 1219 states have internal predecessors, (3994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:15,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1220 states to 1220 states and 3994 transitions. [2022-03-01 17:33:15,126 INFO L78 Accepts]: Start accepts. Automaton has 1220 states and 3994 transitions. Word has length 24 [2022-03-01 17:33:15,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:15,126 INFO L470 AbstractCegarLoop]: Abstraction has 1220 states and 3994 transitions. [2022-03-01 17:33:15,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:15,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1220 states and 3994 transitions. [2022-03-01 17:33:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:15,128 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:15,128 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:15,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-03-01 17:33:15,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:15,328 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:15,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:15,329 INFO L85 PathProgramCache]: Analyzing trace with hash 1201419605, now seen corresponding path program 146 times [2022-03-01 17:33:15,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:15,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482149718] [2022-03-01 17:33:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:15,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:15,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:15,442 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:15,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:15,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482149718] [2022-03-01 17:33:15,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482149718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:15,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731841808] [2022-03-01 17:33:15,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:33:15,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:15,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:15,444 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:15,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-01 17:33:15,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:33:15,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:15,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:15,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:15,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:33:15,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:33:15,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-01 17:33:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:15,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:16,156 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:16,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-03-01 17:33:16,279 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:16,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 19 [2022-03-01 17:33:16,284 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:16,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731841808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:16,284 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:16,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:33:16,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070995261] [2022-03-01 17:33:16,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:16,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:33:16,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:16,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:33:16,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:33:16,285 INFO L87 Difference]: Start difference. First operand 1220 states and 3994 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:16,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:16,742 INFO L93 Difference]: Finished difference Result 1432 states and 4610 transitions. [2022-03-01 17:33:16,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:33:16,743 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:16,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:16,745 INFO L225 Difference]: With dead ends: 1432 [2022-03-01 17:33:16,745 INFO L226 Difference]: Without dead ends: 1401 [2022-03-01 17:33:16,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:33:16,745 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 98 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:16,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 278 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 902 Invalid, 0 Unknown, 110 Unchecked, 0.4s Time] [2022-03-01 17:33:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1401 states. [2022-03-01 17:33:16,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1401 to 1264. [2022-03-01 17:33:16,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 3.27236737925574) internal successors, (4133), 1263 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:16,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4133 transitions. [2022-03-01 17:33:16,760 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4133 transitions. Word has length 24 [2022-03-01 17:33:16,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:16,760 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 4133 transitions. [2022-03-01 17:33:16,760 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:16,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4133 transitions. [2022-03-01 17:33:16,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:16,761 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:16,761 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:16,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-03-01 17:33:16,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:16,962 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:16,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:16,962 INFO L85 PathProgramCache]: Analyzing trace with hash 203356405, now seen corresponding path program 147 times [2022-03-01 17:33:16,962 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:16,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631666579] [2022-03-01 17:33:16,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:16,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:17,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:33:17,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:17,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631666579] [2022-03-01 17:33:17,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631666579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:17,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446796477] [2022-03-01 17:33:17,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:33:17,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:17,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:17,191 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:17,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-01 17:33:17,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:33:17,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:17,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:17,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:17,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:33:17,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:33:17,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-01 17:33:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:33:17,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:18,063 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:18,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2022-03-01 17:33:18,195 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:18,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:33:18,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446796477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:18,201 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:18,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:33:18,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737243715] [2022-03-01 17:33:18,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:18,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:33:18,202 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:18,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:33:18,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:33:18,202 INFO L87 Difference]: Start difference. First operand 1264 states and 4133 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:19,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:19,038 INFO L93 Difference]: Finished difference Result 1607 states and 5077 transitions. [2022-03-01 17:33:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:33:19,038 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:19,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:19,041 INFO L225 Difference]: With dead ends: 1607 [2022-03-01 17:33:19,041 INFO L226 Difference]: Without dead ends: 1586 [2022-03-01 17:33:19,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=211, Invalid=1271, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:33:19,041 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 115 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:19,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 299 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 675 Invalid, 0 Unknown, 64 Unchecked, 0.3s Time] [2022-03-01 17:33:19,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2022-03-01 17:33:19,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 1264. [2022-03-01 17:33:19,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 3.27236737925574) internal successors, (4133), 1263 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:19,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4133 transitions. [2022-03-01 17:33:19,057 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4133 transitions. Word has length 24 [2022-03-01 17:33:19,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:19,057 INFO L470 AbstractCegarLoop]: Abstraction has 1264 states and 4133 transitions. [2022-03-01 17:33:19,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:19,057 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4133 transitions. [2022-03-01 17:33:19,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:19,058 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:19,059 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:19,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-03-01 17:33:19,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:19,259 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:19,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:19,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1922889403, now seen corresponding path program 148 times [2022-03-01 17:33:19,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:19,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222919216] [2022-03-01 17:33:19,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:19,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:19,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:33:19,438 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:19,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222919216] [2022-03-01 17:33:19,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222919216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:19,438 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481740343] [2022-03-01 17:33:19,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:33:19,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:19,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:19,439 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:19,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-01 17:33:19,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:33:19,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:19,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:33:19,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:19,566 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:33:19,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:33:19,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:33:19,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:33:19,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:20,330 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:20,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 101 [2022-03-01 17:33:20,561 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:20,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:33:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:33:20,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481740343] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:20,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:20,567 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-01 17:33:20,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334166151] [2022-03-01 17:33:20,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:20,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:33:20,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:20,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:33:20,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:33:20,567 INFO L87 Difference]: Start difference. First operand 1264 states and 4133 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:21,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:21,651 INFO L93 Difference]: Finished difference Result 1665 states and 5234 transitions. [2022-03-01 17:33:21,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:33:21,651 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:21,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:21,654 INFO L225 Difference]: With dead ends: 1665 [2022-03-01 17:33:21,654 INFO L226 Difference]: Without dead ends: 1542 [2022-03-01 17:33:21,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=258, Invalid=1382, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:33:21,655 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 136 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 1094 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:21,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 317 Invalid, 1141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1094 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:33:21,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2022-03-01 17:33:21,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1262. [2022-03-01 17:33:21,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1262 states, 1261 states have (on average 3.2720063441712925) internal successors, (4126), 1261 states have internal predecessors, (4126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:21,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1262 states to 1262 states and 4126 transitions. [2022-03-01 17:33:21,671 INFO L78 Accepts]: Start accepts. Automaton has 1262 states and 4126 transitions. Word has length 24 [2022-03-01 17:33:21,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:21,671 INFO L470 AbstractCegarLoop]: Abstraction has 1262 states and 4126 transitions. [2022-03-01 17:33:21,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:21,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1262 states and 4126 transitions. [2022-03-01 17:33:21,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:21,673 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:21,673 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:21,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-03-01 17:33:21,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:21,873 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:21,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:21,873 INFO L85 PathProgramCache]: Analyzing trace with hash 982188377, now seen corresponding path program 149 times [2022-03-01 17:33:21,873 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:21,874 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374085951] [2022-03-01 17:33:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:21,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:22,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:22,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374085951] [2022-03-01 17:33:22,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374085951] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:22,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907665868] [2022-03-01 17:33:22,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:33:22,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:22,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:22,085 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:22,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-01 17:33:22,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:33:22,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:22,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:22,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:22,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:22,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:33:22,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:22,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:33:22,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:22,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:23,295 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:23,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:33:23,513 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:23,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:23,521 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907665868] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:23,521 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:23,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:33:23,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147446165] [2022-03-01 17:33:23,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:23,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:33:23,522 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:23,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:33:23,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:33:23,522 INFO L87 Difference]: Start difference. First operand 1262 states and 4126 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:23,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:23,745 INFO L93 Difference]: Finished difference Result 1384 states and 4484 transitions. [2022-03-01 17:33:23,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:33:23,745 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:23,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:23,748 INFO L225 Difference]: With dead ends: 1384 [2022-03-01 17:33:23,748 INFO L226 Difference]: Without dead ends: 1353 [2022-03-01 17:33:23,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:33:23,748 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 193 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:23,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 179 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 412 Invalid, 0 Unknown, 193 Unchecked, 0.2s Time] [2022-03-01 17:33:23,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2022-03-01 17:33:23,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 1265. [2022-03-01 17:33:23,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.2721518987341773) internal successors, (4136), 1264 states have internal predecessors, (4136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:23,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4136 transitions. [2022-03-01 17:33:23,763 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4136 transitions. Word has length 24 [2022-03-01 17:33:23,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:23,763 INFO L470 AbstractCegarLoop]: Abstraction has 1265 states and 4136 transitions. [2022-03-01 17:33:23,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:23,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4136 transitions. [2022-03-01 17:33:23,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:23,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:23,765 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:23,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-03-01 17:33:23,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:23,965 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:23,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:23,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1954492277, now seen corresponding path program 150 times [2022-03-01 17:33:23,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:23,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007824764] [2022-03-01 17:33:23,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:23,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:24,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:24,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007824764] [2022-03-01 17:33:24,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007824764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:24,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588582409] [2022-03-01 17:33:24,204 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:33:24,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:24,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:24,205 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:24,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-01 17:33:24,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:33:24,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:24,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:24,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:24,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:24,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:33:24,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:24,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:33:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:24,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:25,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:25,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-03-01 17:33:25,489 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:25,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:25,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588582409] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:25,498 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:25,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:33:25,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719941890] [2022-03-01 17:33:25,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:25,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:33:25,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:25,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:33:25,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:33:25,499 INFO L87 Difference]: Start difference. First operand 1265 states and 4136 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:25,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:25,870 INFO L93 Difference]: Finished difference Result 1385 states and 4489 transitions. [2022-03-01 17:33:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:33:25,870 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:25,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:25,873 INFO L225 Difference]: With dead ends: 1385 [2022-03-01 17:33:25,873 INFO L226 Difference]: Without dead ends: 1354 [2022-03-01 17:33:25,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:33:25,873 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 70 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 401 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:25,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 232 Invalid, 981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 578 Invalid, 0 Unknown, 401 Unchecked, 0.2s Time] [2022-03-01 17:33:25,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2022-03-01 17:33:25,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1266. [2022-03-01 17:33:25,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 3.273517786561265) internal successors, (4141), 1265 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:25,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 4141 transitions. [2022-03-01 17:33:25,889 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 4141 transitions. Word has length 24 [2022-03-01 17:33:25,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:25,889 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 4141 transitions. [2022-03-01 17:33:25,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:25,889 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 4141 transitions. [2022-03-01 17:33:25,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:25,890 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:25,890 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:25,907 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Ended with exit code 0 [2022-03-01 17:33:26,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:26,091 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:26,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1176032755, now seen corresponding path program 151 times [2022-03-01 17:33:26,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:26,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407444910] [2022-03-01 17:33:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:26,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:26,326 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:26,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407444910] [2022-03-01 17:33:26,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407444910] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:26,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842280594] [2022-03-01 17:33:26,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:33:26,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:26,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:26,328 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:26,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-01 17:33:26,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:26,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:33:26,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:26,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:26,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:33:26,570 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:26,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:33:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:26,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:27,379 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:27,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 99 [2022-03-01 17:33:27,605 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:27,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:33:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:27,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842280594] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:27,613 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:27,613 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-01 17:33:27,613 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675602476] [2022-03-01 17:33:27,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:27,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:33:27,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:27,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:33:27,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:33:27,614 INFO L87 Difference]: Start difference. First operand 1266 states and 4141 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:30,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:30,685 INFO L93 Difference]: Finished difference Result 2367 states and 6884 transitions. [2022-03-01 17:33:30,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:33:30,685 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:30,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:30,689 INFO L225 Difference]: With dead ends: 2367 [2022-03-01 17:33:30,689 INFO L226 Difference]: Without dead ends: 2059 [2022-03-01 17:33:30,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=438, Invalid=2318, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:33:30,689 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 347 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 1399 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 563 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:30,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 563 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1399 Invalid, 0 Unknown, 113 Unchecked, 0.7s Time] [2022-03-01 17:33:30,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2059 states. [2022-03-01 17:33:30,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2059 to 1295. [2022-03-01 17:33:30,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1295 states, 1294 states have (on average 3.2805255023183926) internal successors, (4245), 1294 states have internal predecessors, (4245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:30,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 4245 transitions. [2022-03-01 17:33:30,709 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 4245 transitions. Word has length 24 [2022-03-01 17:33:30,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:30,709 INFO L470 AbstractCegarLoop]: Abstraction has 1295 states and 4245 transitions. [2022-03-01 17:33:30,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:30,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 4245 transitions. [2022-03-01 17:33:30,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:30,711 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:30,711 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:30,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Forceful destruction successful, exit code 0 [2022-03-01 17:33:30,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-03-01 17:33:30,911 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:30,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:30,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1966803575, now seen corresponding path program 152 times [2022-03-01 17:33:30,912 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:30,912 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034666535] [2022-03-01 17:33:30,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:30,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:30,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:33:31,075 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:31,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034666535] [2022-03-01 17:33:31,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034666535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:31,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855739894] [2022-03-01 17:33:31,075 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:33:31,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:31,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:31,076 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:31,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-01 17:33:31,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:33:31,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:31,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:31,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:31,272 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:31,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:33:31,361 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:31,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:33:31,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:33:31,469 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:33:31,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:31,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:31,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-03-01 17:33:32,092 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:32,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:33:32,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855739894] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:32,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:32,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:33:32,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340429850] [2022-03-01 17:33:32,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:32,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:33:32,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:32,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:33:32,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:33:32,101 INFO L87 Difference]: Start difference. First operand 1295 states and 4245 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:32,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:32,327 INFO L93 Difference]: Finished difference Result 1490 states and 4778 transitions. [2022-03-01 17:33:32,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:33:32,328 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:32,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:32,330 INFO L225 Difference]: With dead ends: 1490 [2022-03-01 17:33:32,330 INFO L226 Difference]: Without dead ends: 1387 [2022-03-01 17:33:32,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:33:32,331 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 82 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 524 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:32,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 225 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 336 Invalid, 0 Unknown, 524 Unchecked, 0.1s Time] [2022-03-01 17:33:32,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1387 states. [2022-03-01 17:33:32,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1387 to 1309. [2022-03-01 17:33:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1308 states have (on average 3.2775229357798166) internal successors, (4287), 1308 states have internal predecessors, (4287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:32,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 4287 transitions. [2022-03-01 17:33:32,345 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 4287 transitions. Word has length 24 [2022-03-01 17:33:32,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:32,345 INFO L470 AbstractCegarLoop]: Abstraction has 1309 states and 4287 transitions. [2022-03-01 17:33:32,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 25 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:32,346 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 4287 transitions. [2022-03-01 17:33:32,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:32,347 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:32,347 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:32,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Ended with exit code 0 [2022-03-01 17:33:32,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2022-03-01 17:33:32,548 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:32,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:32,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1387462695, now seen corresponding path program 153 times [2022-03-01 17:33:32,548 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:32,548 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352730116] [2022-03-01 17:33:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:32,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:32,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:32,722 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:32,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352730116] [2022-03-01 17:33:32,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352730116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:32,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678405339] [2022-03-01 17:33:32,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:33:32,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:32,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:32,723 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:32,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-01 17:33:32,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:33:32,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:32,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:32,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:32,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:32,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:33:33,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:33,007 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:33:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:33,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:33,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:33,650 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-03-01 17:33:33,806 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:33,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:33,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678405339] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:33,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:33,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:33:33,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069712455] [2022-03-01 17:33:33,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:33,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:33:33,815 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:33,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:33:33,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:33:33,815 INFO L87 Difference]: Start difference. First operand 1309 states and 4287 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:34,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:34,339 INFO L93 Difference]: Finished difference Result 1616 states and 5145 transitions. [2022-03-01 17:33:34,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:33:34,340 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:34,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:34,342 INFO L225 Difference]: With dead ends: 1616 [2022-03-01 17:33:34,343 INFO L226 Difference]: Without dead ends: 1509 [2022-03-01 17:33:34,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:33:34,343 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 121 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:34,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 276 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 597 Invalid, 0 Unknown, 244 Unchecked, 0.3s Time] [2022-03-01 17:33:34,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2022-03-01 17:33:34,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1323. [2022-03-01 17:33:34,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1323 states, 1322 states have (on average 3.2745839636913767) internal successors, (4329), 1322 states have internal predecessors, (4329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:34,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 4329 transitions. [2022-03-01 17:33:34,360 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 4329 transitions. Word has length 24 [2022-03-01 17:33:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:34,360 INFO L470 AbstractCegarLoop]: Abstraction has 1323 states and 4329 transitions. [2022-03-01 17:33:34,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 4329 transitions. [2022-03-01 17:33:34,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:34,362 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:34,362 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:34,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-03-01 17:33:34,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2022-03-01 17:33:34,562 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:34,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:34,563 INFO L85 PathProgramCache]: Analyzing trace with hash -238172401, now seen corresponding path program 154 times [2022-03-01 17:33:34,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:34,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613524603] [2022-03-01 17:33:34,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:34,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:34,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:34,714 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:34,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613524603] [2022-03-01 17:33:34,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613524603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:34,714 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195328766] [2022-03-01 17:33:34,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:33:34,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:34,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:34,716 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:34,716 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-01 17:33:34,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:33:34,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:34,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:33:34,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:34,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:33:34,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:33:35,062 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:35,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:35,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:35,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-03-01 17:33:35,807 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:35,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:33:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:35,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195328766] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:35,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:35,813 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:33:35,813 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738784795] [2022-03-01 17:33:35,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:35,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:33:35,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:35,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:33:35,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:33:35,814 INFO L87 Difference]: Start difference. First operand 1323 states and 4329 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:37,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:37,271 INFO L93 Difference]: Finished difference Result 1918 states and 6004 transitions. [2022-03-01 17:33:37,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:33:37,271 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:37,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:37,274 INFO L225 Difference]: With dead ends: 1918 [2022-03-01 17:33:37,274 INFO L226 Difference]: Without dead ends: 1765 [2022-03-01 17:33:37,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=211, Invalid=1121, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:33:37,275 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 191 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 1259 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:37,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 348 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1259 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:33:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2022-03-01 17:33:37,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1349. [2022-03-01 17:33:37,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1349 states, 1348 states have (on average 3.2744807121661723) internal successors, (4414), 1348 states have internal predecessors, (4414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:37,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1349 states to 1349 states and 4414 transitions. [2022-03-01 17:33:37,293 INFO L78 Accepts]: Start accepts. Automaton has 1349 states and 4414 transitions. Word has length 24 [2022-03-01 17:33:37,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:37,293 INFO L470 AbstractCegarLoop]: Abstraction has 1349 states and 4414 transitions. [2022-03-01 17:33:37,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 26 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:37,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1349 states and 4414 transitions. [2022-03-01 17:33:37,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:37,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:37,294 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:37,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Forceful destruction successful, exit code 0 [2022-03-01 17:33:37,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:37,495 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:37,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:37,495 INFO L85 PathProgramCache]: Analyzing trace with hash -819933181, now seen corresponding path program 155 times [2022-03-01 17:33:37,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:37,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081166853] [2022-03-01 17:33:37,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:37,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:37,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:37,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081166853] [2022-03-01 17:33:37,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081166853] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:37,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666413549] [2022-03-01 17:33:37,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:33:37,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:37,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:37,731 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:37,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-01 17:33:37,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:33:37,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:37,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:37,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:37,907 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:37,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:33:37,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:37,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:33:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:38,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:38,891 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:38,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-03-01 17:33:39,091 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:39,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:39,100 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:39,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666413549] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:39,100 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:39,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:33:39,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053323817] [2022-03-01 17:33:39,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:39,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:33:39,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:39,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:33:39,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:33:39,101 INFO L87 Difference]: Start difference. First operand 1349 states and 4414 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:39,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:39,367 INFO L93 Difference]: Finished difference Result 1524 states and 4904 transitions. [2022-03-01 17:33:39,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:33:39,368 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:39,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:39,370 INFO L225 Difference]: With dead ends: 1524 [2022-03-01 17:33:39,370 INFO L226 Difference]: Without dead ends: 1458 [2022-03-01 17:33:39,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:33:39,371 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 69 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:39,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 172 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 359 Invalid, 0 Unknown, 113 Unchecked, 0.2s Time] [2022-03-01 17:33:39,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1458 states. [2022-03-01 17:33:39,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1458 to 1350. [2022-03-01 17:33:39,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 3.2750185322461083) internal successors, (4418), 1349 states have internal predecessors, (4418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:39,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 4418 transitions. [2022-03-01 17:33:39,387 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 4418 transitions. Word has length 24 [2022-03-01 17:33:39,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:39,387 INFO L470 AbstractCegarLoop]: Abstraction has 1350 states and 4418 transitions. [2022-03-01 17:33:39,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:39,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 4418 transitions. [2022-03-01 17:33:39,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:39,388 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:39,388 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:39,405 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Ended with exit code 0 [2022-03-01 17:33:39,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:39,589 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:39,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:39,589 INFO L85 PathProgramCache]: Analyzing trace with hash -935453895, now seen corresponding path program 156 times [2022-03-01 17:33:39,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:39,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781938473] [2022-03-01 17:33:39,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:39,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:39,824 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:39,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781938473] [2022-03-01 17:33:39,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781938473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:39,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190950319] [2022-03-01 17:33:39,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:33:39,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:39,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:39,828 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:39,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-01 17:33:39,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:33:39,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:39,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:39,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:40,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:40,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:33:40,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:40,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:33:40,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:40,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:40,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:40,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-03-01 17:33:41,003 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:41,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:41,012 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:41,012 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190950319] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:41,012 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:41,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:33:41,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086110365] [2022-03-01 17:33:41,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:41,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:33:41,013 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:41,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:33:41,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:33:41,013 INFO L87 Difference]: Start difference. First operand 1350 states and 4418 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:41,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:41,762 INFO L93 Difference]: Finished difference Result 1556 states and 5034 transitions. [2022-03-01 17:33:41,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:33:41,762 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:41,765 INFO L225 Difference]: With dead ends: 1556 [2022-03-01 17:33:41,765 INFO L226 Difference]: Without dead ends: 1483 [2022-03-01 17:33:41,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=169, Invalid=1091, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:33:41,765 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 98 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 201 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:41,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 227 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 550 Invalid, 0 Unknown, 201 Unchecked, 0.2s Time] [2022-03-01 17:33:41,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1483 states. [2022-03-01 17:33:41,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1483 to 1357. [2022-03-01 17:33:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 3.2787610619469025) internal successors, (4446), 1356 states have internal predecessors, (4446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 4446 transitions. [2022-03-01 17:33:41,781 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 4446 transitions. Word has length 24 [2022-03-01 17:33:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:41,781 INFO L470 AbstractCegarLoop]: Abstraction has 1357 states and 4446 transitions. [2022-03-01 17:33:41,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 4446 transitions. [2022-03-01 17:33:41,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:41,783 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:41,783 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:41,799 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Ended with exit code 0 [2022-03-01 17:33:41,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:41,983 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:41,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:41,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1810949227, now seen corresponding path program 157 times [2022-03-01 17:33:41,984 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:41,984 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314548085] [2022-03-01 17:33:41,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:41,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:41,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:42,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:42,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314548085] [2022-03-01 17:33:42,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314548085] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:42,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175899483] [2022-03-01 17:33:42,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:33:42,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:42,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:42,187 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:42,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-01 17:33:42,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:42,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:42,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:42,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:42,368 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:33:42,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:42,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:33:42,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-01 17:33:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:42,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:43,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:43,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:33:43,549 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:43,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:43,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175899483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:43,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:43,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:33:43,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862736759] [2022-03-01 17:33:43,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:43,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:33:43,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:43,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:33:43,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:33:43,558 INFO L87 Difference]: Start difference. First operand 1357 states and 4446 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:43,766 INFO L93 Difference]: Finished difference Result 1536 states and 4935 transitions. [2022-03-01 17:33:43,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:33:43,767 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:43,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:43,769 INFO L225 Difference]: With dead ends: 1536 [2022-03-01 17:33:43,769 INFO L226 Difference]: Without dead ends: 1478 [2022-03-01 17:33:43,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:33:43,770 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 31 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:43,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 275 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 429 Invalid, 0 Unknown, 90 Unchecked, 0.2s Time] [2022-03-01 17:33:43,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2022-03-01 17:33:43,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1385. [2022-03-01 17:33:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1384 states have (on average 3.264450867052023) internal successors, (4518), 1384 states have internal predecessors, (4518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:43,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 4518 transitions. [2022-03-01 17:33:43,786 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 4518 transitions. Word has length 24 [2022-03-01 17:33:43,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:43,786 INFO L470 AbstractCegarLoop]: Abstraction has 1385 states and 4518 transitions. [2022-03-01 17:33:43,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:43,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 4518 transitions. [2022-03-01 17:33:43,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:43,788 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:43,788 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:43,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-03-01 17:33:43,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2022-03-01 17:33:43,988 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:43,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:43,989 INFO L85 PathProgramCache]: Analyzing trace with hash 266583787, now seen corresponding path program 158 times [2022-03-01 17:33:43,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:43,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331361541] [2022-03-01 17:33:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:43,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:44,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:44,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331361541] [2022-03-01 17:33:44,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331361541] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:44,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411830155] [2022-03-01 17:33:44,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:33:44,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:44,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:44,193 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:44,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-01 17:33:44,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:33:44,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:44,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:44,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:44,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:44,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:33:44,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:44,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:33:44,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-01 17:33:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:44,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:45,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:45,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:33:45,544 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:45,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:45,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:45,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411830155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:45,553 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:45,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:33:45,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307598376] [2022-03-01 17:33:45,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:45,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:33:45,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:45,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:33:45,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:33:45,554 INFO L87 Difference]: Start difference. First operand 1385 states and 4518 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:45,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:45,750 INFO L93 Difference]: Finished difference Result 1548 states and 5004 transitions. [2022-03-01 17:33:45,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:33:45,750 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:45,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:45,753 INFO L225 Difference]: With dead ends: 1548 [2022-03-01 17:33:45,753 INFO L226 Difference]: Without dead ends: 1517 [2022-03-01 17:33:45,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:33:45,754 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 101 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 447 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:45,754 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 196 Invalid, 816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 368 Invalid, 0 Unknown, 447 Unchecked, 0.2s Time] [2022-03-01 17:33:45,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2022-03-01 17:33:45,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1359. [2022-03-01 17:33:45,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 3.279823269513991) internal successors, (4454), 1358 states have internal predecessors, (4454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:45,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 4454 transitions. [2022-03-01 17:33:45,778 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 4454 transitions. Word has length 24 [2022-03-01 17:33:45,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:45,778 INFO L470 AbstractCegarLoop]: Abstraction has 1359 states and 4454 transitions. [2022-03-01 17:33:45,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:45,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 4454 transitions. [2022-03-01 17:33:45,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:45,781 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:45,781 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:45,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Forceful destruction successful, exit code 0 [2022-03-01 17:33:45,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:45,991 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:45,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:45,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1326546457, now seen corresponding path program 159 times [2022-03-01 17:33:45,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:45,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380668341] [2022-03-01 17:33:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:45,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:45,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:46,182 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:46,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380668341] [2022-03-01 17:33:46,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380668341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:46,182 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234367975] [2022-03-01 17:33:46,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:33:46,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:46,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:46,183 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:46,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-01 17:33:46,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:33:46,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:46,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:46,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:46,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:46,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:33:46,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:46,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:33:46,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:46,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:47,086 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:47,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:33:47,343 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:47,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:47,352 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:47,352 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234367975] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:47,352 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:47,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:33:47,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139205615] [2022-03-01 17:33:47,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:47,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:33:47,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:47,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:33:47,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:33:47,353 INFO L87 Difference]: Start difference. First operand 1359 states and 4454 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:47,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:47,640 INFO L93 Difference]: Finished difference Result 1503 states and 4852 transitions. [2022-03-01 17:33:47,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:33:47,641 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:47,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:47,643 INFO L225 Difference]: With dead ends: 1503 [2022-03-01 17:33:47,643 INFO L226 Difference]: Without dead ends: 1468 [2022-03-01 17:33:47,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:33:47,644 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 227 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:47,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 235 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 447 Invalid, 0 Unknown, 227 Unchecked, 0.2s Time] [2022-03-01 17:33:47,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2022-03-01 17:33:47,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1359. [2022-03-01 17:33:47,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 3.279823269513991) internal successors, (4454), 1358 states have internal predecessors, (4454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 4454 transitions. [2022-03-01 17:33:47,663 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 4454 transitions. Word has length 24 [2022-03-01 17:33:47,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:47,664 INFO L470 AbstractCegarLoop]: Abstraction has 1359 states and 4454 transitions. [2022-03-01 17:33:47,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 4454 transitions. [2022-03-01 17:33:47,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:47,665 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:47,665 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:47,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-03-01 17:33:47,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:47,866 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:47,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:47,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2015556643, now seen corresponding path program 160 times [2022-03-01 17:33:47,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:47,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680501668] [2022-03-01 17:33:47,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:47,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:47,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:48,041 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:48,042 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:48,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680501668] [2022-03-01 17:33:48,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680501668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:48,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231556323] [2022-03-01 17:33:48,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:33:48,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:48,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:48,043 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:48,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-01 17:33:48,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:33:48,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:48,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:48,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:48,214 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:48,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:33:48,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:48,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:33:48,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:48,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:48,966 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:48,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:33:49,139 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:49,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:49,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:49,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231556323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:49,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:49,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:33:49,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752554338] [2022-03-01 17:33:49,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:49,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:33:49,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:49,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:33:49,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:33:49,149 INFO L87 Difference]: Start difference. First operand 1359 states and 4454 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:49,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:49,391 INFO L93 Difference]: Finished difference Result 1506 states and 4875 transitions. [2022-03-01 17:33:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:33:49,391 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:49,394 INFO L225 Difference]: With dead ends: 1506 [2022-03-01 17:33:49,394 INFO L226 Difference]: Without dead ends: 1475 [2022-03-01 17:33:49,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:33:49,394 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 37 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 190 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:49,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 269 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 563 Invalid, 0 Unknown, 190 Unchecked, 0.2s Time] [2022-03-01 17:33:49,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2022-03-01 17:33:49,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1375. [2022-03-01 17:33:49,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.2714701601164484) internal successors, (4495), 1374 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:49,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4495 transitions. [2022-03-01 17:33:49,410 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4495 transitions. Word has length 24 [2022-03-01 17:33:49,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:49,411 INFO L470 AbstractCegarLoop]: Abstraction has 1375 states and 4495 transitions. [2022-03-01 17:33:49,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:49,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4495 transitions. [2022-03-01 17:33:49,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:49,412 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:49,412 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:49,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Ended with exit code 0 [2022-03-01 17:33:49,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:49,613 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:49,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:49,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1686930267, now seen corresponding path program 161 times [2022-03-01 17:33:49,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:49,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639809901] [2022-03-01 17:33:49,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:49,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:49,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:49,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639809901] [2022-03-01 17:33:49,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639809901] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:49,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501961878] [2022-03-01 17:33:49,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:33:49,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:49,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:49,808 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:49,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-01 17:33:49,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:33:49,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:49,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:49,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:49,985 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:49,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:33:50,189 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:50,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:33:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:50,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:50,807 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:50,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:33:50,985 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:50,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:50,993 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:50,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501961878] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:50,993 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:50,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:33:50,994 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295516896] [2022-03-01 17:33:50,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:50,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:33:50,994 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:50,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:33:50,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:33:50,994 INFO L87 Difference]: Start difference. First operand 1375 states and 4495 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:51,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:51,191 INFO L93 Difference]: Finished difference Result 1480 states and 4805 transitions. [2022-03-01 17:33:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:33:51,191 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:51,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:51,194 INFO L225 Difference]: With dead ends: 1480 [2022-03-01 17:33:51,194 INFO L226 Difference]: Without dead ends: 1477 [2022-03-01 17:33:51,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:33:51,194 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 51 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:51,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 254 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 434 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-03-01 17:33:51,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1477 states. [2022-03-01 17:33:51,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1477 to 1359. [2022-03-01 17:33:51,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 1358 states have (on average 3.279823269513991) internal successors, (4454), 1358 states have internal predecessors, (4454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 4454 transitions. [2022-03-01 17:33:51,210 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 4454 transitions. Word has length 24 [2022-03-01 17:33:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:51,210 INFO L470 AbstractCegarLoop]: Abstraction has 1359 states and 4454 transitions. [2022-03-01 17:33:51,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:51,210 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 4454 transitions. [2022-03-01 17:33:51,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:51,212 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:51,212 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:51,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-03-01 17:33:51,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:51,412 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:51,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:51,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1600968887, now seen corresponding path program 162 times [2022-03-01 17:33:51,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:51,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847003421] [2022-03-01 17:33:51,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:51,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:33:51,563 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:51,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847003421] [2022-03-01 17:33:51,563 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847003421] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:51,563 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455206298] [2022-03-01 17:33:51,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:33:51,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:51,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:51,564 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:51,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-01 17:33:51,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:33:51,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:51,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:51,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:51,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:33:51,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:33:51,898 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:33:51,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:52,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:52,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-03-01 17:33:52,498 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:52,498 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:52,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:33:52,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455206298] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:52,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:52,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:33:52,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057005692] [2022-03-01 17:33:52,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:52,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:33:52,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:52,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:33:52,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:33:52,507 INFO L87 Difference]: Start difference. First operand 1359 states and 4454 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:52,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:52,957 INFO L93 Difference]: Finished difference Result 1771 states and 5748 transitions. [2022-03-01 17:33:52,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:33:52,957 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:52,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:52,960 INFO L225 Difference]: With dead ends: 1771 [2022-03-01 17:33:52,960 INFO L226 Difference]: Without dead ends: 1668 [2022-03-01 17:33:52,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:33:52,963 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 86 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 714 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:52,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 256 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 714 Invalid, 0 Unknown, 179 Unchecked, 0.3s Time] [2022-03-01 17:33:52,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1668 states. [2022-03-01 17:33:52,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1668 to 1375. [2022-03-01 17:33:52,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1375 states, 1374 states have (on average 3.2758369723435226) internal successors, (4501), 1374 states have internal predecessors, (4501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:52,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1375 states to 1375 states and 4501 transitions. [2022-03-01 17:33:52,983 INFO L78 Accepts]: Start accepts. Automaton has 1375 states and 4501 transitions. Word has length 24 [2022-03-01 17:33:52,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:52,983 INFO L470 AbstractCegarLoop]: Abstraction has 1375 states and 4501 transitions. [2022-03-01 17:33:52,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 24 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:52,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1375 states and 4501 transitions. [2022-03-01 17:33:52,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:52,984 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:52,985 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:53,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Ended with exit code 0 [2022-03-01 17:33:53,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2022-03-01 17:33:53,185 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:53,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:53,185 INFO L85 PathProgramCache]: Analyzing trace with hash 660267861, now seen corresponding path program 163 times [2022-03-01 17:33:53,185 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:53,185 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946080109] [2022-03-01 17:33:53,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:53,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:53,351 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:53,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:53,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946080109] [2022-03-01 17:33:53,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946080109] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:53,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73015517] [2022-03-01 17:33:53,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:33:53,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:53,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:53,352 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:53,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-01 17:33:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:53,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:33:53,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:53,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:33:53,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:33:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:53,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:54,418 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:54,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-03-01 17:33:54,635 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:54,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:33:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:54,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73015517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:54,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:54,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:33:54,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725754794] [2022-03-01 17:33:54,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:54,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:33:54,644 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:54,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:33:54,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:33:54,645 INFO L87 Difference]: Start difference. First operand 1375 states and 4501 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:55,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:55,743 INFO L93 Difference]: Finished difference Result 2033 states and 6405 transitions. [2022-03-01 17:33:55,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:33:55,743 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:55,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:55,747 INFO L225 Difference]: With dead ends: 2033 [2022-03-01 17:33:55,747 INFO L226 Difference]: Without dead ends: 1880 [2022-03-01 17:33:55,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=219, Invalid=1113, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:33:55,747 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 178 mSDsluCounter, 616 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:55,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 337 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 836 Invalid, 0 Unknown, 168 Unchecked, 0.4s Time] [2022-03-01 17:33:55,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2022-03-01 17:33:55,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1396. [2022-03-01 17:33:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 3.27168458781362) internal successors, (4564), 1395 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:55,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 4564 transitions. [2022-03-01 17:33:55,768 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 4564 transitions. Word has length 24 [2022-03-01 17:33:55,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:55,768 INFO L470 AbstractCegarLoop]: Abstraction has 1396 states and 4564 transitions. [2022-03-01 17:33:55,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:55,768 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 4564 transitions. [2022-03-01 17:33:55,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:55,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:55,770 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:55,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-03-01 17:33:55,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:55,971 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:55,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:55,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1903033789, now seen corresponding path program 164 times [2022-03-01 17:33:55,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:55,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539209658] [2022-03-01 17:33:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:55,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:55,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:56,169 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:56,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:56,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539209658] [2022-03-01 17:33:56,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539209658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:56,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052638997] [2022-03-01 17:33:56,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:33:56,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:56,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:56,171 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:56,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-01 17:33:56,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:33:56,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:56,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:56,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:56,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:33:56,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:33:56,572 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:56,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:57,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:57,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-03-01 17:33:57,390 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:57,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:57,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:57,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052638997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:57,408 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:57,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:33:57,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687528741] [2022-03-01 17:33:57,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:57,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:33:57,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:57,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:33:57,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:33:57,409 INFO L87 Difference]: Start difference. First operand 1396 states and 4564 transitions. Second operand has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:57,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:57,758 INFO L93 Difference]: Finished difference Result 1803 states and 5835 transitions. [2022-03-01 17:33:57,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:33:57,758 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:57,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:57,761 INFO L225 Difference]: With dead ends: 1803 [2022-03-01 17:33:57,761 INFO L226 Difference]: Without dead ends: 1741 [2022-03-01 17:33:57,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:33:57,762 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 115 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:57,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 204 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 532 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-03-01 17:33:57,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1741 states. [2022-03-01 17:33:57,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1741 to 1396. [2022-03-01 17:33:57,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1396 states, 1395 states have (on average 3.27168458781362) internal successors, (4564), 1395 states have internal predecessors, (4564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:57,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1396 states to 1396 states and 4564 transitions. [2022-03-01 17:33:57,779 INFO L78 Accepts]: Start accepts. Automaton has 1396 states and 4564 transitions. Word has length 24 [2022-03-01 17:33:57,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:57,779 INFO L470 AbstractCegarLoop]: Abstraction has 1396 states and 4564 transitions. [2022-03-01 17:33:57,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:57,779 INFO L276 IsEmpty]: Start isEmpty. Operand 1396 states and 4564 transitions. [2022-03-01 17:33:57,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:57,781 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:57,781 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:57,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Ended with exit code 0 [2022-03-01 17:33:57,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-03-01 17:33:57,981 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:57,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:57,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1015768551, now seen corresponding path program 165 times [2022-03-01 17:33:57,982 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:57,982 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925444019] [2022-03-01 17:33:57,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:57,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:58,134 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:58,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925444019] [2022-03-01 17:33:58,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925444019] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:58,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906494014] [2022-03-01 17:33:58,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:33:58,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:58,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:58,135 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:58,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-01 17:33:58,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:33:58,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:58,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:58,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:58,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:33:58,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:33:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:58,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:58,935 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:58,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-01 17:33:59,071 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:59,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:33:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:33:59,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906494014] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:59,076 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:59,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:33:59,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671114331] [2022-03-01 17:33:59,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:59,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:33:59,077 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:59,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:33:59,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:33:59,077 INFO L87 Difference]: Start difference. First operand 1396 states and 4564 transitions. Second operand has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:59,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:59,622 INFO L93 Difference]: Finished difference Result 2092 states and 6642 transitions. [2022-03-01 17:33:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:33:59,622 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:33:59,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:59,626 INFO L225 Difference]: With dead ends: 2092 [2022-03-01 17:33:59,626 INFO L226 Difference]: Without dead ends: 2035 [2022-03-01 17:33:59,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:33:59,626 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 154 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:59,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 229 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:33:59,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2035 states. [2022-03-01 17:33:59,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2035 to 1430. [2022-03-01 17:33:59,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1430 states, 1429 states have (on average 3.27851644506648) internal successors, (4685), 1429 states have internal predecessors, (4685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:59,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1430 states to 1430 states and 4685 transitions. [2022-03-01 17:33:59,645 INFO L78 Accepts]: Start accepts. Automaton has 1430 states and 4685 transitions. Word has length 24 [2022-03-01 17:33:59,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:59,645 INFO L470 AbstractCegarLoop]: Abstraction has 1430 states and 4685 transitions. [2022-03-01 17:33:59,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 24 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:59,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1430 states and 4685 transitions. [2022-03-01 17:33:59,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:33:59,647 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:59,647 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:59,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-03-01 17:33:59,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:59,848 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:33:59,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:59,848 INFO L85 PathProgramCache]: Analyzing trace with hash -414136377, now seen corresponding path program 166 times [2022-03-01 17:33:59,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:59,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906745898] [2022-03-01 17:33:59,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:59,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:00,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:00,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906745898] [2022-03-01 17:34:00,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906745898] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:00,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137015030] [2022-03-01 17:34:00,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:34:00,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:00,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:00,092 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:00,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-01 17:34:00,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:34:00,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:00,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:34:00,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:00,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:00,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:34:00,350 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:00,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:34:00,570 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:00,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:01,278 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:01,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 63 [2022-03-01 17:34:01,411 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:34:01,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:34:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:01,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137015030] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:01,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:01,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-01 17:34:01,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569261099] [2022-03-01 17:34:01,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:01,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:34:01,420 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:01,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:34:01,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:34:01,420 INFO L87 Difference]: Start difference. First operand 1430 states and 4685 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:01,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:01,735 INFO L93 Difference]: Finished difference Result 1567 states and 5085 transitions. [2022-03-01 17:34:01,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:34:01,735 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:01,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:01,738 INFO L225 Difference]: With dead ends: 1567 [2022-03-01 17:34:01,738 INFO L226 Difference]: Without dead ends: 1522 [2022-03-01 17:34:01,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:34:01,738 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 53 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:01,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 204 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 477 Invalid, 0 Unknown, 149 Unchecked, 0.2s Time] [2022-03-01 17:34:01,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1522 states. [2022-03-01 17:34:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1522 to 1436. [2022-03-01 17:34:01,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.2801393728223) internal successors, (4707), 1435 states have internal predecessors, (4707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:01,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 4707 transitions. [2022-03-01 17:34:01,754 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 4707 transitions. Word has length 24 [2022-03-01 17:34:01,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:01,754 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 4707 transitions. [2022-03-01 17:34:01,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:01,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 4707 transitions. [2022-03-01 17:34:01,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:01,757 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:01,757 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:01,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-01 17:34:01,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:01,958 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:01,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:01,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1578578641, now seen corresponding path program 167 times [2022-03-01 17:34:01,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:01,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172048230] [2022-03-01 17:34:01,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:01,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:02,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:02,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172048230] [2022-03-01 17:34:02,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172048230] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:02,173 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314785722] [2022-03-01 17:34:02,173 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:34:02,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:02,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:02,174 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:02,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-01 17:34:02,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:34:02,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:02,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:34:02,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:02,303 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:02,303 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:34:02,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:02,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:34:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:02,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:03,250 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:03,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-01 17:34:03,407 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:34:03,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:34:03,415 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:03,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314785722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:03,415 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:03,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:34:03,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173717652] [2022-03-01 17:34:03,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:03,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:34:03,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:03,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:34:03,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:34:03,416 INFO L87 Difference]: Start difference. First operand 1436 states and 4707 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:03,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:03,704 INFO L93 Difference]: Finished difference Result 1579 states and 5129 transitions. [2022-03-01 17:34:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:34:03,704 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:03,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:03,707 INFO L225 Difference]: With dead ends: 1579 [2022-03-01 17:34:03,707 INFO L226 Difference]: Without dead ends: 1544 [2022-03-01 17:34:03,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:34:03,707 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 68 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:03,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 241 Invalid, 965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 541 Invalid, 0 Unknown, 423 Unchecked, 0.2s Time] [2022-03-01 17:34:03,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2022-03-01 17:34:03,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1440. [2022-03-01 17:34:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1440 states, 1439 states have (on average 3.2828353022932593) internal successors, (4724), 1439 states have internal predecessors, (4724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:03,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1440 states to 1440 states and 4724 transitions. [2022-03-01 17:34:03,723 INFO L78 Accepts]: Start accepts. Automaton has 1440 states and 4724 transitions. Word has length 24 [2022-03-01 17:34:03,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:03,723 INFO L470 AbstractCegarLoop]: Abstraction has 1440 states and 4724 transitions. [2022-03-01 17:34:03,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:03,723 INFO L276 IsEmpty]: Start isEmpty. Operand 1440 states and 4724 transitions. [2022-03-01 17:34:03,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:03,725 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:03,725 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:03,741 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-03-01 17:34:03,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2022-03-01 17:34:03,926 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:03,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:03,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1512561781, now seen corresponding path program 168 times [2022-03-01 17:34:03,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:03,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964972675] [2022-03-01 17:34:03,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:03,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:04,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:04,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964972675] [2022-03-01 17:34:04,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964972675] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:04,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482404276] [2022-03-01 17:34:04,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:34:04,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:04,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:04,137 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:04,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-01 17:34:04,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:34:04,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:04,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:34:04,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:04,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:34:04,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:34:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:04,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:05,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:05,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 63 [2022-03-01 17:34:05,404 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:34:05,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:34:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:05,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482404276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:05,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:05,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-01 17:34:05,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839504372] [2022-03-01 17:34:05,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:05,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:34:05,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:05,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:34:05,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:34:05,411 INFO L87 Difference]: Start difference. First operand 1440 states and 4724 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:09,599 INFO L93 Difference]: Finished difference Result 3325 states and 10008 transitions. [2022-03-01 17:34:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:34:09,600 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:09,605 INFO L225 Difference]: With dead ends: 3325 [2022-03-01 17:34:09,605 INFO L226 Difference]: Without dead ends: 3048 [2022-03-01 17:34:09,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=668, Invalid=3114, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 17:34:09,605 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 320 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 541 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:09,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 541 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-01 17:34:09,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3048 states. [2022-03-01 17:34:09,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3048 to 1482. [2022-03-01 17:34:09,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1482 states, 1481 states have (on average 3.310600945307225) internal successors, (4903), 1481 states have internal predecessors, (4903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:09,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 4903 transitions. [2022-03-01 17:34:09,634 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 4903 transitions. Word has length 24 [2022-03-01 17:34:09,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:09,634 INFO L470 AbstractCegarLoop]: Abstraction has 1482 states and 4903 transitions. [2022-03-01 17:34:09,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:09,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 4903 transitions. [2022-03-01 17:34:09,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:09,636 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:09,636 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:09,652 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:09,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:09,837 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:09,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:09,837 INFO L85 PathProgramCache]: Analyzing trace with hash -4156451, now seen corresponding path program 169 times [2022-03-01 17:34:09,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:09,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31054141] [2022-03-01 17:34:09,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:09,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:10,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:10,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31054141] [2022-03-01 17:34:10,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31054141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:10,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156621677] [2022-03-01 17:34:10,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:34:10,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:10,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:10,069 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:10,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-01 17:34:10,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:10,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:34:10,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:10,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:10,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:34:10,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:10,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:34:10,487 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:10,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:11,144 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:11,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-03-01 17:34:11,260 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:34:11,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:34:11,269 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:11,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156621677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:11,269 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:11,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-01 17:34:11,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871341383] [2022-03-01 17:34:11,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:11,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:34:11,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:11,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:34:11,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:34:11,270 INFO L87 Difference]: Start difference. First operand 1482 states and 4903 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:12,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:12,165 INFO L93 Difference]: Finished difference Result 1949 states and 6120 transitions. [2022-03-01 17:34:12,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:34:12,165 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:12,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:12,169 INFO L225 Difference]: With dead ends: 1949 [2022-03-01 17:34:12,169 INFO L226 Difference]: Without dead ends: 1771 [2022-03-01 17:34:12,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:34:12,169 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 170 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 386 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:12,169 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 334 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 645 Invalid, 0 Unknown, 386 Unchecked, 0.3s Time] [2022-03-01 17:34:12,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1771 states. [2022-03-01 17:34:12,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1771 to 1493. [2022-03-01 17:34:12,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1492 states have (on average 3.3156836461126007) internal successors, (4947), 1492 states have internal predecessors, (4947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:12,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 4947 transitions. [2022-03-01 17:34:12,188 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 4947 transitions. Word has length 24 [2022-03-01 17:34:12,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:12,188 INFO L470 AbstractCegarLoop]: Abstraction has 1493 states and 4947 transitions. [2022-03-01 17:34:12,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:12,188 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 4947 transitions. [2022-03-01 17:34:12,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:12,190 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:12,190 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:12,206 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-03-01 17:34:12,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:12,391 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:12,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:12,391 INFO L85 PathProgramCache]: Analyzing trace with hash -2078221265, now seen corresponding path program 170 times [2022-03-01 17:34:12,391 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:12,391 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429703855] [2022-03-01 17:34:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:12,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:12,614 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:12,614 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:12,614 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429703855] [2022-03-01 17:34:12,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429703855] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:12,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451666905] [2022-03-01 17:34:12,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:34:12,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:12,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:12,616 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:12,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-01 17:34:12,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:34:12,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:12,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:34:12,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:12,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:12,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:34:13,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:13,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:13,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-01 17:34:13,107 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:13,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:13,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:13,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-01 17:34:14,008 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:34:14,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:34:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:14,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451666905] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:14,023 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:14,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:34:14,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235834857] [2022-03-01 17:34:14,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:14,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:34:14,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:14,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:34:14,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:34:14,024 INFO L87 Difference]: Start difference. First operand 1493 states and 4947 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:14,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:14,292 INFO L93 Difference]: Finished difference Result 1654 states and 5383 transitions. [2022-03-01 17:34:14,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:34:14,292 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:14,295 INFO L225 Difference]: With dead ends: 1654 [2022-03-01 17:34:14,295 INFO L226 Difference]: Without dead ends: 1608 [2022-03-01 17:34:14,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:34:14,295 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 94 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 346 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:14,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 233 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 421 Invalid, 0 Unknown, 346 Unchecked, 0.2s Time] [2022-03-01 17:34:14,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2022-03-01 17:34:14,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1502. [2022-03-01 17:34:14,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 3.319786808794137) internal successors, (4983), 1501 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 4983 transitions. [2022-03-01 17:34:14,312 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 4983 transitions. Word has length 24 [2022-03-01 17:34:14,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:14,312 INFO L470 AbstractCegarLoop]: Abstraction has 1502 states and 4983 transitions. [2022-03-01 17:34:14,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:14,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 4983 transitions. [2022-03-01 17:34:14,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:14,314 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:14,314 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:14,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:14,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:14,515 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:14,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:14,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1873613849, now seen corresponding path program 171 times [2022-03-01 17:34:14,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:14,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753276919] [2022-03-01 17:34:14,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:14,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:14,747 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:14,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753276919] [2022-03-01 17:34:14,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753276919] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:14,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009241906] [2022-03-01 17:34:14,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:34:14,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:14,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:14,748 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:14,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-01 17:34:14,777 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:34:14,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:14,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:34:14,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:14,873 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:14,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:34:15,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:15,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:34:15,116 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:15,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:15,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:15,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 48 [2022-03-01 17:34:15,734 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:34:15,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:34:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:15,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009241906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:15,742 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:15,743 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:34:15,743 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263467054] [2022-03-01 17:34:15,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:15,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:34:15,743 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:15,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:34:15,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:34:15,743 INFO L87 Difference]: Start difference. First operand 1502 states and 4983 transitions. Second operand has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:16,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:16,120 INFO L93 Difference]: Finished difference Result 1683 states and 5475 transitions. [2022-03-01 17:34:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:34:16,121 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:16,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:16,124 INFO L225 Difference]: With dead ends: 1683 [2022-03-01 17:34:16,124 INFO L226 Difference]: Without dead ends: 1625 [2022-03-01 17:34:16,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=870, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:34:16,124 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 202 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:16,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 306 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 455 Invalid, 0 Unknown, 202 Unchecked, 0.2s Time] [2022-03-01 17:34:16,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1625 states. [2022-03-01 17:34:16,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1625 to 1502. [2022-03-01 17:34:16,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 3.319786808794137) internal successors, (4983), 1501 states have internal predecessors, (4983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:16,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 4983 transitions. [2022-03-01 17:34:16,141 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 4983 transitions. Word has length 24 [2022-03-01 17:34:16,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:16,141 INFO L470 AbstractCegarLoop]: Abstraction has 1502 states and 4983 transitions. [2022-03-01 17:34:16,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 26 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:16,141 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 4983 transitions. [2022-03-01 17:34:16,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:16,143 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:16,143 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:16,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-03-01 17:34:16,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2022-03-01 17:34:16,343 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:16,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:16,343 INFO L85 PathProgramCache]: Analyzing trace with hash -166161681, now seen corresponding path program 172 times [2022-03-01 17:34:16,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:16,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145205166] [2022-03-01 17:34:16,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:16,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:16,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:16,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145205166] [2022-03-01 17:34:16,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145205166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:16,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469489805] [2022-03-01 17:34:16,541 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:34:16,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:16,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:16,543 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:16,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-01 17:34:16,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:34:16,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:16,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:34:16,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:16,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:34:16,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:34:16,903 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:16,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:17,480 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:17,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 63 [2022-03-01 17:34:17,660 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:34:17,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:34:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:17,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469489805] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:17,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:17,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:34:17,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697849479] [2022-03-01 17:34:17,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:17,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:34:17,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:17,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:34:17,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:34:17,666 INFO L87 Difference]: Start difference. First operand 1502 states and 4983 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:20,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:20,138 INFO L93 Difference]: Finished difference Result 3169 states and 9929 transitions. [2022-03-01 17:34:20,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:34:20,138 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:20,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:20,143 INFO L225 Difference]: With dead ends: 3169 [2022-03-01 17:34:20,143 INFO L226 Difference]: Without dead ends: 2929 [2022-03-01 17:34:20,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=524, Invalid=2128, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 17:34:20,143 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 319 mSDsluCounter, 985 mSDsCounter, 0 mSdLazyCounter, 1504 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 1599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:20,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 467 Invalid, 1599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1504 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-01 17:34:20,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2929 states. [2022-03-01 17:34:20,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2929 to 1530. [2022-03-01 17:34:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1530 states, 1529 states have (on average 3.328319162851537) internal successors, (5089), 1529 states have internal predecessors, (5089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:20,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1530 states to 1530 states and 5089 transitions. [2022-03-01 17:34:20,169 INFO L78 Accepts]: Start accepts. Automaton has 1530 states and 5089 transitions. Word has length 24 [2022-03-01 17:34:20,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:20,169 INFO L470 AbstractCegarLoop]: Abstraction has 1530 states and 5089 transitions. [2022-03-01 17:34:20,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:20,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1530 states and 5089 transitions. [2022-03-01 17:34:20,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:20,171 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:20,171 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:20,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-03-01 17:34:20,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:20,371 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:20,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:20,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1124789121, now seen corresponding path program 173 times [2022-03-01 17:34:20,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:20,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697150665] [2022-03-01 17:34:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:20,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:20,520 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:20,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:20,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697150665] [2022-03-01 17:34:20,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697150665] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:20,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920292427] [2022-03-01 17:34:20,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:34:20,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:20,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:20,522 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:20,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-01 17:34:20,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:34:20,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:20,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:34:20,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:20,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:34:20,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:34:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:20,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:21,282 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:21,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 48 [2022-03-01 17:34:21,352 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:34:21,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:34:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:21,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920292427] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:21,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:21,358 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:34:21,358 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199099027] [2022-03-01 17:34:21,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:21,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:34:21,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:21,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:34:21,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:34:21,358 INFO L87 Difference]: Start difference. First operand 1530 states and 5089 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:21,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:21,950 INFO L93 Difference]: Finished difference Result 2024 states and 6618 transitions. [2022-03-01 17:34:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:34:21,950 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:21,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:21,953 INFO L225 Difference]: With dead ends: 2024 [2022-03-01 17:34:21,953 INFO L226 Difference]: Without dead ends: 1993 [2022-03-01 17:34:21,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:34:21,954 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 137 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:21,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 227 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:34:21,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2022-03-01 17:34:21,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1513. [2022-03-01 17:34:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1513 states, 1512 states have (on average 3.316798941798942) internal successors, (5015), 1512 states have internal predecessors, (5015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:21,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1513 states to 1513 states and 5015 transitions. [2022-03-01 17:34:21,973 INFO L78 Accepts]: Start accepts. Automaton has 1513 states and 5015 transitions. Word has length 24 [2022-03-01 17:34:21,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:21,973 INFO L470 AbstractCegarLoop]: Abstraction has 1513 states and 5015 transitions. [2022-03-01 17:34:21,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:21,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1513 states and 5015 transitions. [2022-03-01 17:34:21,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:21,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:21,975 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:21,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:22,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:22,176 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:22,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:22,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1680695765, now seen corresponding path program 174 times [2022-03-01 17:34:22,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:22,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252419672] [2022-03-01 17:34:22,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:22,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:22,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:22,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:22,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252419672] [2022-03-01 17:34:22,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252419672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:22,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693584815] [2022-03-01 17:34:22,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:34:22,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:22,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:22,376 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:22,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-01 17:34:22,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:34:22,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:22,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:34:22,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:22,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-03-01 17:34:22,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2022-03-01 17:34:22,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-01 17:34:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:22,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:23,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:23,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 57 [2022-03-01 17:34:23,184 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:23,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 103 [2022-03-01 17:34:23,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:23,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 81 [2022-03-01 17:34:23,282 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:23,282 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693584815] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:23,282 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:23,282 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:34:23,282 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335477048] [2022-03-01 17:34:23,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:23,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:34:23,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:23,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:34:23,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:34:23,283 INFO L87 Difference]: Start difference. First operand 1513 states and 5015 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:23,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:23,723 INFO L93 Difference]: Finished difference Result 1678 states and 5457 transitions. [2022-03-01 17:34:23,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:34:23,723 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:23,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:23,726 INFO L225 Difference]: With dead ends: 1678 [2022-03-01 17:34:23,726 INFO L226 Difference]: Without dead ends: 1588 [2022-03-01 17:34:23,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:34:23,726 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 68 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:23,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 172 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:23,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2022-03-01 17:34:23,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1517. [2022-03-01 17:34:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1516 states have (on average 3.316622691292876) internal successors, (5028), 1516 states have internal predecessors, (5028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 5028 transitions. [2022-03-01 17:34:23,743 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 5028 transitions. Word has length 24 [2022-03-01 17:34:23,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:23,743 INFO L470 AbstractCegarLoop]: Abstraction has 1517 states and 5028 transitions. [2022-03-01 17:34:23,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 5028 transitions. [2022-03-01 17:34:23,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:23,745 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:23,745 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:23,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-03-01 17:34:23,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-03-01 17:34:23,946 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:23,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:23,946 INFO L85 PathProgramCache]: Analyzing trace with hash -516762591, now seen corresponding path program 175 times [2022-03-01 17:34:23,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:23,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204527597] [2022-03-01 17:34:23,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:23,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:24,171 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:24,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:24,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204527597] [2022-03-01 17:34:24,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204527597] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:24,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789144089] [2022-03-01 17:34:24,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:34:24,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:24,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:24,173 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:24,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-01 17:34:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:24,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:34:24,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:24,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:24,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 39 [2022-03-01 17:34:24,387 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:24,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:34:24,390 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:24,390 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2022-03-01 17:34:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:24,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:24,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:24,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-03-01 17:34:25,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:25,143 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 127 [2022-03-01 17:34:25,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:25,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 99 [2022-03-01 17:34:25,291 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:25,292 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789144089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:25,292 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:25,292 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:34:25,292 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360339349] [2022-03-01 17:34:25,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:25,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:34:25,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:25,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:34:25,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:34:25,293 INFO L87 Difference]: Start difference. First operand 1517 states and 5028 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:25,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:25,550 INFO L93 Difference]: Finished difference Result 1633 states and 5335 transitions. [2022-03-01 17:34:25,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:34:25,550 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:25,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:25,553 INFO L225 Difference]: With dead ends: 1633 [2022-03-01 17:34:25,553 INFO L226 Difference]: Without dead ends: 1567 [2022-03-01 17:34:25,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:34:25,553 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:25,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 184 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 435 Invalid, 0 Unknown, 164 Unchecked, 0.2s Time] [2022-03-01 17:34:25,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2022-03-01 17:34:25,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 1519. [2022-03-01 17:34:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 3.3155467720685112) internal successors, (5033), 1518 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:25,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 5033 transitions. [2022-03-01 17:34:25,570 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 5033 transitions. Word has length 24 [2022-03-01 17:34:25,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:25,571 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 5033 transitions. [2022-03-01 17:34:25,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:25,571 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 5033 transitions. [2022-03-01 17:34:25,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:25,572 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:25,572 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:25,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-03-01 17:34:25,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-03-01 17:34:25,774 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:25,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:25,775 INFO L85 PathProgramCache]: Analyzing trace with hash 958854987, now seen corresponding path program 176 times [2022-03-01 17:34:25,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:25,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077902812] [2022-03-01 17:34:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:25,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:25,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:25,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077902812] [2022-03-01 17:34:25,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077902812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:25,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958470211] [2022-03-01 17:34:25,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:34:25,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:25,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:25,965 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:25,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-01 17:34:25,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:34:25,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:25,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:34:25,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:26,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:26,132 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:34:26,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:26,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-01 17:34:26,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:26,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:34:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:26,378 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:26,884 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:26,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-03-01 17:34:27,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:27,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 73 [2022-03-01 17:34:27,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:27,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-03-01 17:34:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:27,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958470211] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:27,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:27,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:34:27,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695477907] [2022-03-01 17:34:27,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:27,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:34:27,282 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:27,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:34:27,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:34:27,282 INFO L87 Difference]: Start difference. First operand 1519 states and 5033 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:27,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:27,843 INFO L93 Difference]: Finished difference Result 1686 states and 5452 transitions. [2022-03-01 17:34:27,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:34:27,843 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:27,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:27,846 INFO L225 Difference]: With dead ends: 1686 [2022-03-01 17:34:27,846 INFO L226 Difference]: Without dead ends: 1606 [2022-03-01 17:34:27,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:34:27,847 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 98 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:27,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 186 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 693 Invalid, 0 Unknown, 22 Unchecked, 0.3s Time] [2022-03-01 17:34:27,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1606 states. [2022-03-01 17:34:27,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1606 to 1521. [2022-03-01 17:34:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 3.3157894736842106) internal successors, (5040), 1520 states have internal predecessors, (5040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:27,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 5040 transitions. [2022-03-01 17:34:27,867 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 5040 transitions. Word has length 24 [2022-03-01 17:34:27,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:27,867 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 5040 transitions. [2022-03-01 17:34:27,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:27,867 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 5040 transitions. [2022-03-01 17:34:27,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:27,869 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:27,869 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:27,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Ended with exit code 0 [2022-03-01 17:34:28,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:28,070 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:28,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:28,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1054209749, now seen corresponding path program 177 times [2022-03-01 17:34:28,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:28,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079592482] [2022-03-01 17:34:28,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:28,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:28,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:28,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:28,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079592482] [2022-03-01 17:34:28,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079592482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:28,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486501783] [2022-03-01 17:34:28,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:34:28,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:28,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:28,232 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:28,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-01 17:34:28,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:34:28,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:28,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:34:28,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:28,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:34:28,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-01 17:34:28,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 6 [2022-03-01 17:34:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:28,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:28,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:28,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-03-01 17:34:29,069 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:29,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2022-03-01 17:34:29,076 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:29,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 56 [2022-03-01 17:34:29,237 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:29,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486501783] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:29,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:29,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:34:29,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472384863] [2022-03-01 17:34:29,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:29,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:34:29,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:29,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:34:29,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:34:29,238 INFO L87 Difference]: Start difference. First operand 1521 states and 5040 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:29,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:29,715 INFO L93 Difference]: Finished difference Result 1594 states and 5242 transitions. [2022-03-01 17:34:29,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:34:29,716 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:29,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:29,718 INFO L225 Difference]: With dead ends: 1594 [2022-03-01 17:34:29,718 INFO L226 Difference]: Without dead ends: 1555 [2022-03-01 17:34:29,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:34:29,719 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 42 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:29,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 202 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 616 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2022-03-01 17:34:29,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1555 states. [2022-03-01 17:34:29,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1555 to 1519. [2022-03-01 17:34:29,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1518 states have (on average 3.3155467720685112) internal successors, (5033), 1518 states have internal predecessors, (5033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:29,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 5033 transitions. [2022-03-01 17:34:29,736 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 5033 transitions. Word has length 24 [2022-03-01 17:34:29,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:29,736 INFO L470 AbstractCegarLoop]: Abstraction has 1519 states and 5033 transitions. [2022-03-01 17:34:29,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:29,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 5033 transitions. [2022-03-01 17:34:29,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:29,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:29,738 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:29,754 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-03-01 17:34:29,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:29,939 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:29,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:29,939 INFO L85 PathProgramCache]: Analyzing trace with hash -705554193, now seen corresponding path program 178 times [2022-03-01 17:34:29,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:29,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097785989] [2022-03-01 17:34:29,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:29,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:29,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:30,126 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:30,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097785989] [2022-03-01 17:34:30,126 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097785989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:30,126 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739573936] [2022-03-01 17:34:30,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:34:30,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:30,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:30,127 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:30,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-01 17:34:30,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:34:30,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:30,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:34:30,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:30,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:30,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:34:30,508 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:30,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:34:30,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:30,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:34:30,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:30,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:31,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:31,050 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-03-01 17:34:31,206 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:31,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 108 [2022-03-01 17:34:31,212 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:31,213 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 86 [2022-03-01 17:34:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:31,302 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739573936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:31,302 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:31,302 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:34:31,302 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277559087] [2022-03-01 17:34:31,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:31,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:34:31,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:31,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:34:31,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:34:31,303 INFO L87 Difference]: Start difference. First operand 1519 states and 5033 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:31,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:31,688 INFO L93 Difference]: Finished difference Result 1683 states and 5469 transitions. [2022-03-01 17:34:31,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:34:31,688 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:31,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:31,691 INFO L225 Difference]: With dead ends: 1683 [2022-03-01 17:34:31,691 INFO L226 Difference]: Without dead ends: 1593 [2022-03-01 17:34:31,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:34:31,691 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 75 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:31,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 209 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 592 Invalid, 0 Unknown, 172 Unchecked, 0.3s Time] [2022-03-01 17:34:31,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2022-03-01 17:34:31,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1522. [2022-03-01 17:34:31,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.31689677843524) internal successors, (5045), 1521 states have internal predecessors, (5045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:31,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5045 transitions. [2022-03-01 17:34:31,708 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5045 transitions. Word has length 24 [2022-03-01 17:34:31,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:31,708 INFO L470 AbstractCegarLoop]: Abstraction has 1522 states and 5045 transitions. [2022-03-01 17:34:31,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:31,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5045 transitions. [2022-03-01 17:34:31,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:31,710 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:31,710 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:31,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-03-01 17:34:31,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:31,911 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:31,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:31,911 INFO L85 PathProgramCache]: Analyzing trace with hash 458378981, now seen corresponding path program 179 times [2022-03-01 17:34:31,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:31,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347811394] [2022-03-01 17:34:31,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:31,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:32,088 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:32,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347811394] [2022-03-01 17:34:32,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347811394] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:32,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366492717] [2022-03-01 17:34:32,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:34:32,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:32,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:32,089 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:32,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-01 17:34:32,118 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:34:32,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:32,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:34:32,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:32,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:34:32,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:34:32,380 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:32,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:32,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:32,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-01 17:34:33,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:33,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 124 [2022-03-01 17:34:33,055 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:33,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 96 [2022-03-01 17:34:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:33,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366492717] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:33,180 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:33,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:34:33,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303916385] [2022-03-01 17:34:33,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:33,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:34:33,180 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:33,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:34:33,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:34:33,181 INFO L87 Difference]: Start difference. First operand 1522 states and 5045 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:33,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:33,932 INFO L93 Difference]: Finished difference Result 1793 states and 5785 transitions. [2022-03-01 17:34:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:34:33,933 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:33,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:33,936 INFO L225 Difference]: With dead ends: 1793 [2022-03-01 17:34:33,936 INFO L226 Difference]: Without dead ends: 1692 [2022-03-01 17:34:33,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=121, Invalid=691, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:34:33,936 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 81 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:33,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 239 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:34:33,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-03-01 17:34:33,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1536. [2022-03-01 17:34:33,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 3.317915309446254) internal successors, (5093), 1535 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:33,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 5093 transitions. [2022-03-01 17:34:33,954 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 5093 transitions. Word has length 24 [2022-03-01 17:34:33,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:33,954 INFO L470 AbstractCegarLoop]: Abstraction has 1536 states and 5093 transitions. [2022-03-01 17:34:33,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:33,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 5093 transitions. [2022-03-01 17:34:33,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:33,956 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:33,956 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:33,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:34,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2022-03-01 17:34:34,156 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:34,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:34,157 INFO L85 PathProgramCache]: Analyzing trace with hash -397003349, now seen corresponding path program 180 times [2022-03-01 17:34:34,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:34,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687706500] [2022-03-01 17:34:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:34,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:34,350 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:34,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687706500] [2022-03-01 17:34:34,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687706500] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:34,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352625059] [2022-03-01 17:34:34,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:34:34,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:34,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:34,352 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:34,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-01 17:34:34,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:34:34,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:34,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:34:34,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:34,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:34,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:34:34,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:34,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:34:34,644 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:34,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-01 17:34:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:34,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:35,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:35,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2022-03-01 17:34:35,304 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:35,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 77 [2022-03-01 17:34:35,310 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:35,310 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 59 [2022-03-01 17:34:35,427 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:35,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352625059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:35,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:35,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:34:35,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605115983] [2022-03-01 17:34:35,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:35,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:34:35,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:35,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:34:35,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:34:35,428 INFO L87 Difference]: Start difference. First operand 1536 states and 5093 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:35,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:35,852 INFO L93 Difference]: Finished difference Result 1612 states and 5283 transitions. [2022-03-01 17:34:35,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:34:35,852 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:35,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:35,855 INFO L225 Difference]: With dead ends: 1612 [2022-03-01 17:34:35,855 INFO L226 Difference]: Without dead ends: 1557 [2022-03-01 17:34:35,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:34:35,855 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 74 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:35,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 224 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 502 Invalid, 0 Unknown, 363 Unchecked, 0.2s Time] [2022-03-01 17:34:35,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1557 states. [2022-03-01 17:34:35,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1557 to 1522. [2022-03-01 17:34:35,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.31689677843524) internal successors, (5045), 1521 states have internal predecessors, (5045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:35,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5045 transitions. [2022-03-01 17:34:35,872 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5045 transitions. Word has length 24 [2022-03-01 17:34:35,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:35,872 INFO L470 AbstractCegarLoop]: Abstraction has 1522 states and 5045 transitions. [2022-03-01 17:34:35,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:35,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5045 transitions. [2022-03-01 17:34:35,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:35,874 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:35,874 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:35,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:36,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:36,074 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:36,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:36,075 INFO L85 PathProgramCache]: Analyzing trace with hash -616234577, now seen corresponding path program 181 times [2022-03-01 17:34:36,075 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:36,075 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721994340] [2022-03-01 17:34:36,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:36,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:36,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:36,301 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:36,301 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:36,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721994340] [2022-03-01 17:34:36,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721994340] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:36,301 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064756126] [2022-03-01 17:34:36,301 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:34:36,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:36,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:36,303 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:36,303 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-01 17:34:36,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:36,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:34:36,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:36,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:36,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:34:36,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:36,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:34:36,659 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:36,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:34:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:36,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:37,455 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:37,455 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-01 17:34:37,596 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:37,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 124 [2022-03-01 17:34:37,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:37,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 96 [2022-03-01 17:34:37,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:37,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064756126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:37,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:37,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:34:37,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208670567] [2022-03-01 17:34:37,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:37,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:34:37,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:37,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:34:37,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:34:37,715 INFO L87 Difference]: Start difference. First operand 1522 states and 5045 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:38,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:38,007 INFO L93 Difference]: Finished difference Result 1602 states and 5277 transitions. [2022-03-01 17:34:38,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:34:38,007 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:38,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:38,010 INFO L225 Difference]: With dead ends: 1602 [2022-03-01 17:34:38,010 INFO L226 Difference]: Without dead ends: 1571 [2022-03-01 17:34:38,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:34:38,010 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 58 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:38,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 190 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 602 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2022-03-01 17:34:38,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1571 states. [2022-03-01 17:34:38,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1571 to 1522. [2022-03-01 17:34:38,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.31689677843524) internal successors, (5045), 1521 states have internal predecessors, (5045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:38,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5045 transitions. [2022-03-01 17:34:38,027 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5045 transitions. Word has length 24 [2022-03-01 17:34:38,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:38,027 INFO L470 AbstractCegarLoop]: Abstraction has 1522 states and 5045 transitions. [2022-03-01 17:34:38,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5045 transitions. [2022-03-01 17:34:38,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:38,029 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:38,029 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:38,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-03-01 17:34:38,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2022-03-01 17:34:38,229 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:38,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:38,230 INFO L85 PathProgramCache]: Analyzing trace with hash 742052065, now seen corresponding path program 182 times [2022-03-01 17:34:38,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:38,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506043246] [2022-03-01 17:34:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:38,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:38,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:38,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506043246] [2022-03-01 17:34:38,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506043246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:38,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714695621] [2022-03-01 17:34:38,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:34:38,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:38,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:38,399 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:38,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-01 17:34:38,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:34:38,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:38,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:34:38,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:38,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 40 [2022-03-01 17:34:38,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 45 [2022-03-01 17:34:38,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:38,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:39,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:39,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 74 [2022-03-01 17:34:39,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:39,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 80 [2022-03-01 17:34:39,551 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:39,551 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 62 [2022-03-01 17:34:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:39,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714695621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:39,661 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:39,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:34:39,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103578672] [2022-03-01 17:34:39,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:39,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:34:39,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:39,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:34:39,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:34:39,661 INFO L87 Difference]: Start difference. First operand 1522 states and 5045 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:40,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:40,178 INFO L93 Difference]: Finished difference Result 1868 states and 5946 transitions. [2022-03-01 17:34:40,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:34:40,178 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:40,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:40,181 INFO L225 Difference]: With dead ends: 1868 [2022-03-01 17:34:40,181 INFO L226 Difference]: Without dead ends: 1775 [2022-03-01 17:34:40,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:34:40,182 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 119 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 746 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:40,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 215 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 746 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:40,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2022-03-01 17:34:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 1522. [2022-03-01 17:34:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.31689677843524) internal successors, (5045), 1521 states have internal predecessors, (5045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:40,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5045 transitions. [2022-03-01 17:34:40,201 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5045 transitions. Word has length 24 [2022-03-01 17:34:40,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:40,201 INFO L470 AbstractCegarLoop]: Abstraction has 1522 states and 5045 transitions. [2022-03-01 17:34:40,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:40,201 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5045 transitions. [2022-03-01 17:34:40,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:40,203 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:40,203 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:40,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:40,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:40,403 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:40,404 INFO L85 PathProgramCache]: Analyzing trace with hash 169127301, now seen corresponding path program 183 times [2022-03-01 17:34:40,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:40,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176422869] [2022-03-01 17:34:40,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:40,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:40,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:40,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:40,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176422869] [2022-03-01 17:34:40,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176422869] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:40,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341957044] [2022-03-01 17:34:40,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:34:40,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:40,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:40,610 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:40,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-01 17:34:40,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:34:40,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:40,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:34:40,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:40,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:40,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:34:40,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:40,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:34:40,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:40,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:34:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:41,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:41,663 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:41,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 76 [2022-03-01 17:34:41,789 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:41,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 102 [2022-03-01 17:34:41,795 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:41,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 80 [2022-03-01 17:34:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:41,893 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341957044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:41,893 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:41,893 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:34:41,893 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932850076] [2022-03-01 17:34:41,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:41,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:34:41,893 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:41,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:34:41,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:34:41,893 INFO L87 Difference]: Start difference. First operand 1522 states and 5045 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:43,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:43,787 INFO L93 Difference]: Finished difference Result 2210 states and 6855 transitions. [2022-03-01 17:34:43,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:34:43,787 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:43,791 INFO L225 Difference]: With dead ends: 2210 [2022-03-01 17:34:43,791 INFO L226 Difference]: Without dead ends: 2045 [2022-03-01 17:34:43,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:34:43,791 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 113 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 1128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:43,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 379 Invalid, 1128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1087 Invalid, 0 Unknown, 4 Unchecked, 0.5s Time] [2022-03-01 17:34:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2022-03-01 17:34:43,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1522. [2022-03-01 17:34:43,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1522 states, 1521 states have (on average 3.31689677843524) internal successors, (5045), 1521 states have internal predecessors, (5045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1522 states to 1522 states and 5045 transitions. [2022-03-01 17:34:43,814 INFO L78 Accepts]: Start accepts. Automaton has 1522 states and 5045 transitions. Word has length 24 [2022-03-01 17:34:43,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:43,814 INFO L470 AbstractCegarLoop]: Abstraction has 1522 states and 5045 transitions. [2022-03-01 17:34:43,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:43,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1522 states and 5045 transitions. [2022-03-01 17:34:43,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:43,816 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:43,816 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:43,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-03-01 17:34:44,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:44,017 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:44,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:44,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1162785999, now seen corresponding path program 184 times [2022-03-01 17:34:44,017 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:44,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119290324] [2022-03-01 17:34:44,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:44,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:44,232 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:44,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119290324] [2022-03-01 17:34:44,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119290324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:44,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016267157] [2022-03-01 17:34:44,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:34:44,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:44,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:44,234 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:44,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-01 17:34:44,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:34:44,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:44,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:34:44,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:44,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:34:44,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-01 17:34:44,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-01 17:34:44,509 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:44,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:45,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:45,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 95 [2022-03-01 17:34:45,258 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:45,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 127 [2022-03-01 17:34:45,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:45,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 99 [2022-03-01 17:34:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:45,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016267157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:45,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:45,396 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:34:45,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882796070] [2022-03-01 17:34:45,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:45,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:34:45,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:45,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:34:45,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:34:45,396 INFO L87 Difference]: Start difference. First operand 1522 states and 5045 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:45,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:45,815 INFO L93 Difference]: Finished difference Result 1681 states and 5443 transitions. [2022-03-01 17:34:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:34:45,815 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:45,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:45,818 INFO L225 Difference]: With dead ends: 1681 [2022-03-01 17:34:45,818 INFO L226 Difference]: Without dead ends: 1576 [2022-03-01 17:34:45,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:34:45,818 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:45,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 271 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 642 Invalid, 0 Unknown, 144 Unchecked, 0.3s Time] [2022-03-01 17:34:45,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1576 states. [2022-03-01 17:34:45,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1576 to 1525. [2022-03-01 17:34:45,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1525 states, 1524 states have (on average 3.3169291338582676) internal successors, (5055), 1524 states have internal predecessors, (5055), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:45,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1525 states to 1525 states and 5055 transitions. [2022-03-01 17:34:45,846 INFO L78 Accepts]: Start accepts. Automaton has 1525 states and 5055 transitions. Word has length 24 [2022-03-01 17:34:45,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:45,846 INFO L470 AbstractCegarLoop]: Abstraction has 1525 states and 5055 transitions. [2022-03-01 17:34:45,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:45,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1525 states and 5055 transitions. [2022-03-01 17:34:45,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:45,848 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:45,848 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:45,864 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Ended with exit code 0 [2022-03-01 17:34:46,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-03-01 17:34:46,049 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:46,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:46,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1471336843, now seen corresponding path program 185 times [2022-03-01 17:34:46,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:46,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28296550] [2022-03-01 17:34:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:46,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:46,315 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:46,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:46,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28296550] [2022-03-01 17:34:46,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28296550] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:46,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817086678] [2022-03-01 17:34:46,315 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:34:46,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:46,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:46,317 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:46,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-01 17:34:46,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:34:46,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:46,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:34:46,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:46,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:46,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:34:46,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:46,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-01 17:34:46,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:46,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:34:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:46,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:47,217 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:47,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 95 [2022-03-01 17:34:47,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:47,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 124 [2022-03-01 17:34:47,446 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:47,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 96 [2022-03-01 17:34:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:47,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817086678] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:47,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:47,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:34:47,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949998656] [2022-03-01 17:34:47,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:47,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:34:47,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:47,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:34:47,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:34:47,558 INFO L87 Difference]: Start difference. First operand 1525 states and 5055 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:48,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:48,495 INFO L93 Difference]: Finished difference Result 1757 states and 5662 transitions. [2022-03-01 17:34:48,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:34:48,496 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:48,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:48,499 INFO L225 Difference]: With dead ends: 1757 [2022-03-01 17:34:48,499 INFO L226 Difference]: Without dead ends: 1656 [2022-03-01 17:34:48,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:34:48,499 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 125 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:48,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 245 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 692 Invalid, 0 Unknown, 84 Unchecked, 0.3s Time] [2022-03-01 17:34:48,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2022-03-01 17:34:48,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1547. [2022-03-01 17:34:48,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1547 states, 1546 states have (on average 3.3227684346701163) internal successors, (5137), 1546 states have internal predecessors, (5137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:48,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1547 states to 1547 states and 5137 transitions. [2022-03-01 17:34:48,518 INFO L78 Accepts]: Start accepts. Automaton has 1547 states and 5137 transitions. Word has length 24 [2022-03-01 17:34:48,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:48,518 INFO L470 AbstractCegarLoop]: Abstraction has 1547 states and 5137 transitions. [2022-03-01 17:34:48,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:48,518 INFO L276 IsEmpty]: Start isEmpty. Operand 1547 states and 5137 transitions. [2022-03-01 17:34:48,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:48,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:48,520 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:48,536 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Ended with exit code 0 [2022-03-01 17:34:48,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2022-03-01 17:34:48,720 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:48,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:48,721 INFO L85 PathProgramCache]: Analyzing trace with hash -399400821, now seen corresponding path program 186 times [2022-03-01 17:34:48,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:48,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699649699] [2022-03-01 17:34:48,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:48,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:34:48,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:48,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699649699] [2022-03-01 17:34:48,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699649699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:48,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422514481] [2022-03-01 17:34:48,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:34:48,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:48,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:48,956 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:48,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-01 17:34:48,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:34:48,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:48,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:34:48,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:49,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:34:49,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-01 17:34:49,354 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:34:49,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:50,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:50,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 123 [2022-03-01 17:34:50,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:50,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 104 [2022-03-01 17:34:50,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:50,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 82 [2022-03-01 17:34:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:34:50,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422514481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:50,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:50,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:34:50,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405062857] [2022-03-01 17:34:50,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:50,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:34:50,513 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:50,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:34:50,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:34:50,514 INFO L87 Difference]: Start difference. First operand 1547 states and 5137 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:51,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:51,875 INFO L93 Difference]: Finished difference Result 2387 states and 7343 transitions. [2022-03-01 17:34:51,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:34:51,875 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:51,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:51,879 INFO L225 Difference]: With dead ends: 2387 [2022-03-01 17:34:51,879 INFO L226 Difference]: Without dead ends: 2171 [2022-03-01 17:34:51,879 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:34:51,879 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 168 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1067 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:51,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 356 Invalid, 1067 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:34:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2022-03-01 17:34:51,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 1537. [2022-03-01 17:34:51,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1536 states have (on average 3.330078125) internal successors, (5115), 1536 states have internal predecessors, (5115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 5115 transitions. [2022-03-01 17:34:51,902 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 5115 transitions. Word has length 24 [2022-03-01 17:34:51,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:51,902 INFO L470 AbstractCegarLoop]: Abstraction has 1537 states and 5115 transitions. [2022-03-01 17:34:51,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:51,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 5115 transitions. [2022-03-01 17:34:51,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:51,904 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:51,904 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:51,923 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:52,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:52,105 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:52,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:52,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1026952223, now seen corresponding path program 187 times [2022-03-01 17:34:52,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:52,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136554132] [2022-03-01 17:34:52,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:52,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:52,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:52,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:52,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:52,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136554132] [2022-03-01 17:34:52,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136554132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:52,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458139907] [2022-03-01 17:34:52,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:34:52,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:52,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:52,295 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:52,296 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-01 17:34:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:52,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:34:52,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:52,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:34:52,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:34:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:52,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:53,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:53,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 101 [2022-03-01 17:34:53,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:53,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-03-01 17:34:53,275 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:53,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-03-01 17:34:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:53,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458139907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:53,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:53,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:34:53,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113734415] [2022-03-01 17:34:53,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:53,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:34:53,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:53,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:34:53,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:34:53,322 INFO L87 Difference]: Start difference. First operand 1537 states and 5115 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:54,293 INFO L93 Difference]: Finished difference Result 1809 states and 5843 transitions. [2022-03-01 17:34:54,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:34:54,293 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:54,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:54,296 INFO L225 Difference]: With dead ends: 1809 [2022-03-01 17:34:54,296 INFO L226 Difference]: Without dead ends: 1692 [2022-03-01 17:34:54,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=177, Invalid=1013, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:34:54,297 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 117 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:54,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 265 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:34:54,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2022-03-01 17:34:54,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1547. [2022-03-01 17:34:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1547 states, 1546 states have (on average 3.332470892626132) internal successors, (5152), 1546 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:54,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1547 states to 1547 states and 5152 transitions. [2022-03-01 17:34:54,315 INFO L78 Accepts]: Start accepts. Automaton has 1547 states and 5152 transitions. Word has length 24 [2022-03-01 17:34:54,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:54,315 INFO L470 AbstractCegarLoop]: Abstraction has 1547 states and 5152 transitions. [2022-03-01 17:34:54,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:54,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1547 states and 5152 transitions. [2022-03-01 17:34:54,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:54,317 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:54,317 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:54,333 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Ended with exit code 0 [2022-03-01 17:34:54,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-03-01 17:34:54,518 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:54,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:54,518 INFO L85 PathProgramCache]: Analyzing trace with hash 136980951, now seen corresponding path program 188 times [2022-03-01 17:34:54,518 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:54,518 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348527798] [2022-03-01 17:34:54,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:54,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:54,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:54,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348527798] [2022-03-01 17:34:54,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348527798] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:54,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232571755] [2022-03-01 17:34:54,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:34:54,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:54,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:54,702 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:54,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-01 17:34:54,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:34:54,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:54,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:34:54,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:54,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:34:54,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:34:55,028 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:55,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:55,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:55,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-03-01 17:34:55,698 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:55,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:34:55,702 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:55,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:34:55,746 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:55,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232571755] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:55,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:55,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:34:55,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081980878] [2022-03-01 17:34:55,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:55,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:34:55,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:55,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:34:55,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:34:55,747 INFO L87 Difference]: Start difference. First operand 1547 states and 5152 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:56,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:56,494 INFO L93 Difference]: Finished difference Result 1911 states and 6150 transitions. [2022-03-01 17:34:56,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:34:56,494 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:56,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:56,498 INFO L225 Difference]: With dead ends: 1911 [2022-03-01 17:34:56,498 INFO L226 Difference]: Without dead ends: 1818 [2022-03-01 17:34:56,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=799, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:34:56,498 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 110 mSDsluCounter, 611 mSDsCounter, 0 mSdLazyCounter, 1076 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1076 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:56,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 321 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1076 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:34:56,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1818 states. [2022-03-01 17:34:56,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1818 to 1555. [2022-03-01 17:34:56,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1555 states, 1554 states have (on average 3.3294723294723294) internal successors, (5174), 1554 states have internal predecessors, (5174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1555 states to 1555 states and 5174 transitions. [2022-03-01 17:34:56,529 INFO L78 Accepts]: Start accepts. Automaton has 1555 states and 5174 transitions. Word has length 24 [2022-03-01 17:34:56,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:56,529 INFO L470 AbstractCegarLoop]: Abstraction has 1555 states and 5174 transitions. [2022-03-01 17:34:56,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:56,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1555 states and 5174 transitions. [2022-03-01 17:34:56,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:56,531 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:56,531 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:56,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:56,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:56,732 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:56,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:56,732 INFO L85 PathProgramCache]: Analyzing trace with hash -937632607, now seen corresponding path program 189 times [2022-03-01 17:34:56,732 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:56,732 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262849116] [2022-03-01 17:34:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:56,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:56,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:56,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262849116] [2022-03-01 17:34:56,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262849116] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:56,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337680146] [2022-03-01 17:34:56,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:34:56,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:56,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:56,938 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:56,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-01 17:34:56,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:34:56,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:56,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:34:56,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:57,057 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:57,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:34:57,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:57,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:34:57,281 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:57,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:34:57,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:57,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:58,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:58,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-03-01 17:34:58,172 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:58,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 56 [2022-03-01 17:34:58,176 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:34:58,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 46 [2022-03-01 17:34:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:58,220 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337680146] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:58,220 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:58,220 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:34:58,220 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137462482] [2022-03-01 17:34:58,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:58,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:34:58,220 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:58,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:34:58,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:34:58,220 INFO L87 Difference]: Start difference. First operand 1555 states and 5174 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:58,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:58,866 INFO L93 Difference]: Finished difference Result 1914 states and 6142 transitions. [2022-03-01 17:34:58,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:34:58,866 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:34:58,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:58,870 INFO L225 Difference]: With dead ends: 1914 [2022-03-01 17:34:58,870 INFO L226 Difference]: Without dead ends: 1761 [2022-03-01 17:34:58,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:34:58,870 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 187 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 182 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:58,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 189 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 500 Invalid, 0 Unknown, 182 Unchecked, 0.2s Time] [2022-03-01 17:34:58,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1761 states. [2022-03-01 17:34:58,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1761 to 1562. [2022-03-01 17:34:58,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.3324791800128124) internal successors, (5202), 1561 states have internal predecessors, (5202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:58,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5202 transitions. [2022-03-01 17:34:58,890 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5202 transitions. Word has length 24 [2022-03-01 17:34:58,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:58,890 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 5202 transitions. [2022-03-01 17:34:58,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:58,890 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5202 transitions. [2022-03-01 17:34:58,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:34:58,892 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:58,892 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:58,908 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-03-01 17:34:59,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-03-01 17:34:59,093 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:34:59,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:59,093 INFO L85 PathProgramCache]: Analyzing trace with hash 420654035, now seen corresponding path program 190 times [2022-03-01 17:34:59,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:59,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086300348] [2022-03-01 17:34:59,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:59,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:59,272 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:59,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086300348] [2022-03-01 17:34:59,272 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086300348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:59,272 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553559261] [2022-03-01 17:34:59,272 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:34:59,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:59,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:59,273 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:59,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-01 17:34:59,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:34:59,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:59,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:34:59,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:59,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:59,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:34:59,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:34:59,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:59,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:34:59,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:34:59,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:00,381 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:00,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-03-01 17:35:00,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:00,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-01 17:35:00,546 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:00,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 44 [2022-03-01 17:35:00,589 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:00,589 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553559261] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:00,589 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:00,589 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:35:00,589 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906655329] [2022-03-01 17:35:00,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:00,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:35:00,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:00,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:35:00,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:35:00,590 INFO L87 Difference]: Start difference. First operand 1562 states and 5202 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:02,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:02,974 INFO L93 Difference]: Finished difference Result 2486 states and 7598 transitions. [2022-03-01 17:35:02,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:35:02,974 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:02,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:02,978 INFO L225 Difference]: With dead ends: 2486 [2022-03-01 17:35:02,978 INFO L226 Difference]: Without dead ends: 2313 [2022-03-01 17:35:02,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=235, Invalid=1247, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:35:02,979 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 152 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:02,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 399 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:35:02,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2313 states. [2022-03-01 17:35:02,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2313 to 1571. [2022-03-01 17:35:03,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 3.338216560509554) internal successors, (5241), 1570 states have internal predecessors, (5241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:03,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 5241 transitions. [2022-03-01 17:35:03,004 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 5241 transitions. Word has length 24 [2022-03-01 17:35:03,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:03,004 INFO L470 AbstractCegarLoop]: Abstraction has 1571 states and 5241 transitions. [2022-03-01 17:35:03,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:03,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 5241 transitions. [2022-03-01 17:35:03,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:03,006 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:03,006 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:03,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-03-01 17:35:03,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:03,206 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:03,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:03,207 INFO L85 PathProgramCache]: Analyzing trace with hash -152270729, now seen corresponding path program 191 times [2022-03-01 17:35:03,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:03,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568917967] [2022-03-01 17:35:03,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:03,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:03,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:03,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568917967] [2022-03-01 17:35:03,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568917967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:03,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651762586] [2022-03-01 17:35:03,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:35:03,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:03,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:03,467 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:03,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-01 17:35:03,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:35:03,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:03,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:03,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:03,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:03,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:35:03,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:03,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:35:03,642 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:03,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:35:03,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:03,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:04,396 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:04,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-03-01 17:35:04,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:04,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:35:04,531 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:04,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:35:04,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:04,585 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651762586] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:04,585 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:04,585 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:04,585 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439315758] [2022-03-01 17:35:04,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:04,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:04,585 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:04,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:04,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:04,586 INFO L87 Difference]: Start difference. First operand 1571 states and 5241 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:04,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:04,917 INFO L93 Difference]: Finished difference Result 1704 states and 5599 transitions. [2022-03-01 17:35:04,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:35:04,917 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:04,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:04,920 INFO L225 Difference]: With dead ends: 1704 [2022-03-01 17:35:04,920 INFO L226 Difference]: Without dead ends: 1642 [2022-03-01 17:35:04,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:35:04,921 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 64 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:04,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 203 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 629 Invalid, 0 Unknown, 47 Unchecked, 0.3s Time] [2022-03-01 17:35:04,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2022-03-01 17:35:04,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1570. [2022-03-01 17:35:04,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1570 states, 1569 states have (on average 3.337157425111536) internal successors, (5236), 1569 states have internal predecessors, (5236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:04,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1570 states to 1570 states and 5236 transitions. [2022-03-01 17:35:04,941 INFO L78 Accepts]: Start accepts. Automaton has 1570 states and 5236 transitions. Word has length 24 [2022-03-01 17:35:04,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:04,941 INFO L470 AbstractCegarLoop]: Abstraction has 1570 states and 5236 transitions. [2022-03-01 17:35:04,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:04,941 INFO L276 IsEmpty]: Start isEmpty. Operand 1570 states and 5236 transitions. [2022-03-01 17:35:04,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:04,943 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:04,943 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:04,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Ended with exit code 0 [2022-03-01 17:35:05,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:05,144 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:05,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1857882453, now seen corresponding path program 192 times [2022-03-01 17:35:05,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:05,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595947080] [2022-03-01 17:35:05,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:05,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:05,307 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:05,308 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:05,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595947080] [2022-03-01 17:35:05,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595947080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:05,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478250322] [2022-03-01 17:35:05,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:35:05,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:05,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:05,309 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:05,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-01 17:35:05,338 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:35:05,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:05,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:05,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:05,453 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:05,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:35:05,537 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:05,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:05,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:05,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:35:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:05,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:06,080 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:06,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:35:06,244 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:06,245 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-01 17:35:06,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:06,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 17:35:06,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:06,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478250322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:06,298 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:06,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:35:06,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128566773] [2022-03-01 17:35:06,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:06,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:35:06,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:06,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:35:06,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:35:06,299 INFO L87 Difference]: Start difference. First operand 1570 states and 5236 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:06,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:06,549 INFO L93 Difference]: Finished difference Result 1680 states and 5547 transitions. [2022-03-01 17:35:06,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:35:06,550 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:06,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:06,553 INFO L225 Difference]: With dead ends: 1680 [2022-03-01 17:35:06,553 INFO L226 Difference]: Without dead ends: 1649 [2022-03-01 17:35:06,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:35:06,553 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 45 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:06,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 228 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 566 Invalid, 0 Unknown, 330 Unchecked, 0.2s Time] [2022-03-01 17:35:06,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2022-03-01 17:35:06,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1562. [2022-03-01 17:35:06,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1562 states, 1561 states have (on average 3.3369634849455476) internal successors, (5209), 1561 states have internal predecessors, (5209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:06,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1562 states to 1562 states and 5209 transitions. [2022-03-01 17:35:06,575 INFO L78 Accepts]: Start accepts. Automaton has 1562 states and 5209 transitions. Word has length 24 [2022-03-01 17:35:06,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:06,575 INFO L470 AbstractCegarLoop]: Abstraction has 1562 states and 5209 transitions. [2022-03-01 17:35:06,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:06,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1562 states and 5209 transitions. [2022-03-01 17:35:06,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:06,577 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:06,577 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:06,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-03-01 17:35:06,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:06,778 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:06,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:06,778 INFO L85 PathProgramCache]: Analyzing trace with hash -532358289, now seen corresponding path program 193 times [2022-03-01 17:35:06,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:06,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34871472] [2022-03-01 17:35:06,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:06,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:06,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:06,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:06,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34871472] [2022-03-01 17:35:06,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34871472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:06,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983161314] [2022-03-01 17:35:06,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:35:06,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:06,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:06,969 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:06,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-01 17:35:06,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:06,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:35:06,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:07,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:07,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:35:07,279 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:07,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:35:07,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:07,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:35:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:07,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:07,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:07,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-03-01 17:35:08,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:08,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-03-01 17:35:08,193 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:08,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-03-01 17:35:08,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:08,245 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983161314] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:08,245 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:08,245 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:08,245 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460917513] [2022-03-01 17:35:08,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:08,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:08,245 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:08,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:08,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:08,246 INFO L87 Difference]: Start difference. First operand 1562 states and 5209 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:09,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:09,293 INFO L93 Difference]: Finished difference Result 1917 states and 6131 transitions. [2022-03-01 17:35:09,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:35:09,294 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:09,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:09,297 INFO L225 Difference]: With dead ends: 1917 [2022-03-01 17:35:09,297 INFO L226 Difference]: Without dead ends: 1783 [2022-03-01 17:35:09,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:35:09,297 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 109 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:09,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 299 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 880 Invalid, 0 Unknown, 113 Unchecked, 0.4s Time] [2022-03-01 17:35:09,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2022-03-01 17:35:09,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1565. [2022-03-01 17:35:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1564 states have (on average 3.337595907928389) internal successors, (5220), 1564 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:09,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 5220 transitions. [2022-03-01 17:35:09,319 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 5220 transitions. Word has length 24 [2022-03-01 17:35:09,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:09,319 INFO L470 AbstractCegarLoop]: Abstraction has 1565 states and 5220 transitions. [2022-03-01 17:35:09,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:09,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 5220 transitions. [2022-03-01 17:35:09,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:09,321 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:09,321 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:09,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-03-01 17:35:09,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2022-03-01 17:35:09,522 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:09,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:09,522 INFO L85 PathProgramCache]: Analyzing trace with hash 2136973911, now seen corresponding path program 194 times [2022-03-01 17:35:09,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:09,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400015388] [2022-03-01 17:35:09,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:09,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:09,683 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:09,683 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:09,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400015388] [2022-03-01 17:35:09,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400015388] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:09,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277098938] [2022-03-01 17:35:09,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:35:09,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:09,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:09,685 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:09,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-01 17:35:09,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:35:09,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:09,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:09,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:09,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:35:09,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:09,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:35:09,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:09,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:35:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:10,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:10,421 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:10,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-03-01 17:35:10,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:10,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-01 17:35:10,667 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:10,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 17:35:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:10,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277098938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:10,718 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:10,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:10,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932418364] [2022-03-01 17:35:10,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:10,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:10,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:10,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:10,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:10,719 INFO L87 Difference]: Start difference. First operand 1565 states and 5220 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:11,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:11,164 INFO L93 Difference]: Finished difference Result 1710 states and 5638 transitions. [2022-03-01 17:35:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:35:11,164 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:11,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:11,167 INFO L225 Difference]: With dead ends: 1710 [2022-03-01 17:35:11,167 INFO L226 Difference]: Without dead ends: 1634 [2022-03-01 17:35:11,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=648, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:35:11,167 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 78 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:11,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 183 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 717 Invalid, 0 Unknown, 6 Unchecked, 0.3s Time] [2022-03-01 17:35:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1634 states. [2022-03-01 17:35:11,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1634 to 1579. [2022-03-01 17:35:11,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1579 states, 1578 states have (on average 3.343472750316857) internal successors, (5276), 1578 states have internal predecessors, (5276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:11,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1579 states to 1579 states and 5276 transitions. [2022-03-01 17:35:11,185 INFO L78 Accepts]: Start accepts. Automaton has 1579 states and 5276 transitions. Word has length 24 [2022-03-01 17:35:11,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:11,185 INFO L470 AbstractCegarLoop]: Abstraction has 1579 states and 5276 transitions. [2022-03-01 17:35:11,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:11,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1579 states and 5276 transitions. [2022-03-01 17:35:11,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:11,187 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:11,187 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:11,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Ended with exit code 0 [2022-03-01 17:35:11,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-03-01 17:35:11,388 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:11,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1571077783, now seen corresponding path program 195 times [2022-03-01 17:35:11,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:11,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829568723] [2022-03-01 17:35:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:11,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:11,518 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:11,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829568723] [2022-03-01 17:35:11,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829568723] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:11,519 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058529759] [2022-03-01 17:35:11,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:35:11,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:11,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:11,520 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:11,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-01 17:35:11,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:35:11,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:11,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:11,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:11,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-01 17:35:11,671 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:35:11,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-01 17:35:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:11,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:12,055 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:12,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 71 [2022-03-01 17:35:12,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:12,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:35:12,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:12,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:35:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:12,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058529759] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:12,274 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:12,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:35:12,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174695585] [2022-03-01 17:35:12,274 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:12,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:35:12,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:12,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:35:12,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:35:12,274 INFO L87 Difference]: Start difference. First operand 1579 states and 5276 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:12,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:12,624 INFO L93 Difference]: Finished difference Result 1674 states and 5557 transitions. [2022-03-01 17:35:12,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:35:12,625 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:12,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:12,627 INFO L225 Difference]: With dead ends: 1674 [2022-03-01 17:35:12,627 INFO L226 Difference]: Without dead ends: 1667 [2022-03-01 17:35:12,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:35:12,628 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:12,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 176 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 637 Invalid, 0 Unknown, 7 Unchecked, 0.3s Time] [2022-03-01 17:35:12,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1667 states. [2022-03-01 17:35:12,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1667 to 1596. [2022-03-01 17:35:12,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 3.341065830721003) internal successors, (5329), 1595 states have internal predecessors, (5329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:12,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 5329 transitions. [2022-03-01 17:35:12,646 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 5329 transitions. Word has length 24 [2022-03-01 17:35:12,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:12,646 INFO L470 AbstractCegarLoop]: Abstraction has 1596 states and 5329 transitions. [2022-03-01 17:35:12,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 23 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:12,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 5329 transitions. [2022-03-01 17:35:12,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:12,656 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:12,656 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:12,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-03-01 17:35:12,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2022-03-01 17:35:12,857 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:12,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:12,857 INFO L85 PathProgramCache]: Analyzing trace with hash -132608321, now seen corresponding path program 196 times [2022-03-01 17:35:12,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:12,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026360457] [2022-03-01 17:35:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:12,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:12,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:13,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:13,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026360457] [2022-03-01 17:35:13,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026360457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:13,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468391466] [2022-03-01 17:35:13,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:35:13,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:13,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:13,016 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:13,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-01 17:35:13,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:35:13,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:13,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:35:13,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:13,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:35:13,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:13,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:35:13,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:13,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:35:13,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:13,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:13,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:13,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-03-01 17:35:14,056 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:14,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 52 [2022-03-01 17:35:14,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:14,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 42 [2022-03-01 17:35:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:14,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468391466] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:14,109 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:14,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:14,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351176691] [2022-03-01 17:35:14,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:14,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:14,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:14,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:14,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:14,110 INFO L87 Difference]: Start difference. First operand 1596 states and 5329 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:15,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:15,119 INFO L93 Difference]: Finished difference Result 1968 states and 6302 transitions. [2022-03-01 17:35:15,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:35:15,119 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:15,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:15,122 INFO L225 Difference]: With dead ends: 1968 [2022-03-01 17:35:15,122 INFO L226 Difference]: Without dead ends: 1812 [2022-03-01 17:35:15,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:35:15,122 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 155 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:15,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 277 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 951 Invalid, 0 Unknown, 77 Unchecked, 0.4s Time] [2022-03-01 17:35:15,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1812 states. [2022-03-01 17:35:15,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1812 to 1584. [2022-03-01 17:35:15,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1584 states, 1583 states have (on average 3.335439039797852) internal successors, (5280), 1583 states have internal predecessors, (5280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:15,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1584 states to 1584 states and 5280 transitions. [2022-03-01 17:35:15,143 INFO L78 Accepts]: Start accepts. Automaton has 1584 states and 5280 transitions. Word has length 24 [2022-03-01 17:35:15,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:15,143 INFO L470 AbstractCegarLoop]: Abstraction has 1584 states and 5280 transitions. [2022-03-01 17:35:15,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1584 states and 5280 transitions. [2022-03-01 17:35:15,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:15,145 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:15,145 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:15,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-03-01 17:35:15,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:15,346 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:15,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:15,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1500721089, now seen corresponding path program 197 times [2022-03-01 17:35:15,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:15,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676909208] [2022-03-01 17:35:15,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:15,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:15,494 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:15,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676909208] [2022-03-01 17:35:15,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676909208] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:15,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810641363] [2022-03-01 17:35:15,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:35:15,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:15,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:15,495 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:15,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-01 17:35:15,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:35:15,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:15,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:15,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:15,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:35:15,741 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:15,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:35:15,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:15,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:35:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:15,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:16,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:16,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:35:16,453 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:16,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:35:16,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:16,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:35:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:16,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810641363] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:16,506 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:16,506 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:16,506 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333748930] [2022-03-01 17:35:16,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:16,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:16,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:16,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:16,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:16,507 INFO L87 Difference]: Start difference. First operand 1584 states and 5280 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:16,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:16,818 INFO L93 Difference]: Finished difference Result 1662 states and 5485 transitions. [2022-03-01 17:35:16,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:35:16,819 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:16,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:16,821 INFO L225 Difference]: With dead ends: 1662 [2022-03-01 17:35:16,821 INFO L226 Difference]: Without dead ends: 1631 [2022-03-01 17:35:16,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:35:16,822 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:16,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 175 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 577 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2022-03-01 17:35:16,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2022-03-01 17:35:16,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 1595. [2022-03-01 17:35:16,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.3362609786700124) internal successors, (5318), 1594 states have internal predecessors, (5318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:16,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5318 transitions. [2022-03-01 17:35:16,840 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5318 transitions. Word has length 24 [2022-03-01 17:35:16,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:16,840 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5318 transitions. [2022-03-01 17:35:16,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:16,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5318 transitions. [2022-03-01 17:35:16,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:16,842 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:16,842 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:16,858 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-03-01 17:35:17,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-03-01 17:35:17,043 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:17,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:17,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1707529055, now seen corresponding path program 198 times [2022-03-01 17:35:17,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:17,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885823603] [2022-03-01 17:35:17,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:17,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:17,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:17,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:35:17,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:17,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885823603] [2022-03-01 17:35:17,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885823603] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:17,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158568981] [2022-03-01 17:35:17,254 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:35:17,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:17,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:17,256 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:17,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-01 17:35:17,284 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:35:17,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:17,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:35:17,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:17,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:35:17,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:17,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:35:17,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:17,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:35:17,609 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:35:17,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:18,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:18,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 101 [2022-03-01 17:35:18,296 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:18,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-03-01 17:35:18,300 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:18,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-03-01 17:35:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:35:18,344 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158568981] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:18,344 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:18,344 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:18,344 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072933982] [2022-03-01 17:35:18,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:18,344 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:18,344 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:18,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:18,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:18,345 INFO L87 Difference]: Start difference. First operand 1595 states and 5318 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:18,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:18,606 INFO L93 Difference]: Finished difference Result 1668 states and 5472 transitions. [2022-03-01 17:35:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:35:18,606 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:18,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:18,609 INFO L225 Difference]: With dead ends: 1668 [2022-03-01 17:35:18,609 INFO L226 Difference]: Without dead ends: 1588 [2022-03-01 17:35:18,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:18,609 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 57 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:18,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 195 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 632 Invalid, 0 Unknown, 151 Unchecked, 0.2s Time] [2022-03-01 17:35:18,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2022-03-01 17:35:18,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1572. [2022-03-01 17:35:18,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1572 states, 1571 states have (on average 3.3360916613621896) internal successors, (5241), 1571 states have internal predecessors, (5241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:18,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1572 states to 1572 states and 5241 transitions. [2022-03-01 17:35:18,627 INFO L78 Accepts]: Start accepts. Automaton has 1572 states and 5241 transitions. Word has length 24 [2022-03-01 17:35:18,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:18,627 INFO L470 AbstractCegarLoop]: Abstraction has 1572 states and 5241 transitions. [2022-03-01 17:35:18,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:18,627 INFO L276 IsEmpty]: Start isEmpty. Operand 1572 states and 5241 transitions. [2022-03-01 17:35:18,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:18,629 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:18,629 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:18,644 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-03-01 17:35:18,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-03-01 17:35:18,829 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:18,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:18,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1555213131, now seen corresponding path program 199 times [2022-03-01 17:35:18,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:18,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41481776] [2022-03-01 17:35:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:18,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:19,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:19,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41481776] [2022-03-01 17:35:19,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41481776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:19,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795135845] [2022-03-01 17:35:19,071 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:35:19,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:19,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:19,072 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:19,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-01 17:35:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:19,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:35:19,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:19,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:19,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:35:19,349 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:19,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:35:19,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:19,353 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:35:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:19,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:20,286 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:20,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-03-01 17:35:20,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:20,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-03-01 17:35:20,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:20,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-03-01 17:35:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:20,474 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795135845] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:20,474 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:20,474 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:20,474 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402631198] [2022-03-01 17:35:20,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:20,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:20,474 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:20,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:20,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:20,475 INFO L87 Difference]: Start difference. First operand 1572 states and 5241 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:22,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:22,267 INFO L93 Difference]: Finished difference Result 2353 states and 7266 transitions. [2022-03-01 17:35:22,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:35:22,267 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:22,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:22,271 INFO L225 Difference]: With dead ends: 2353 [2022-03-01 17:35:22,271 INFO L226 Difference]: Without dead ends: 2180 [2022-03-01 17:35:22,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=278, Invalid=1282, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:35:22,271 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 259 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:22,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 396 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1182 Invalid, 0 Unknown, 142 Unchecked, 0.5s Time] [2022-03-01 17:35:22,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2180 states. [2022-03-01 17:35:22,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2180 to 1574. [2022-03-01 17:35:22,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 3.337571519389701) internal successors, (5250), 1573 states have internal predecessors, (5250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 5250 transitions. [2022-03-01 17:35:22,294 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 5250 transitions. Word has length 24 [2022-03-01 17:35:22,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:22,294 INFO L470 AbstractCegarLoop]: Abstraction has 1574 states and 5250 transitions. [2022-03-01 17:35:22,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:22,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 5250 transitions. [2022-03-01 17:35:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:22,296 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:22,296 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:22,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-03-01 17:35:22,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:22,496 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:22,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:22,497 INFO L85 PathProgramCache]: Analyzing trace with hash 982288367, now seen corresponding path program 200 times [2022-03-01 17:35:22,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:22,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636735605] [2022-03-01 17:35:22,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:22,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:22,768 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:22,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636735605] [2022-03-01 17:35:22,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636735605] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:22,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199504052] [2022-03-01 17:35:22,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:35:22,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:22,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:22,769 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:22,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-01 17:35:22,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:35:22,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:22,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:22,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:22,883 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:35:22,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:22,952 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:35:22,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:22,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:35:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:23,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:23,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:23,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-03-01 17:35:23,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:23,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-01 17:35:23,873 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:23,873 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 17:35:23,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:23,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199504052] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:23,925 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:23,925 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:23,925 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513946089] [2022-03-01 17:35:23,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:23,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:23,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:23,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:23,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:23,926 INFO L87 Difference]: Start difference. First operand 1574 states and 5250 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:24,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:24,471 INFO L93 Difference]: Finished difference Result 1726 states and 5665 transitions. [2022-03-01 17:35:24,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:35:24,471 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:24,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:24,474 INFO L225 Difference]: With dead ends: 1726 [2022-03-01 17:35:24,474 INFO L226 Difference]: Without dead ends: 1664 [2022-03-01 17:35:24,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:35:24,475 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:24,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 271 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 756 Invalid, 0 Unknown, 82 Unchecked, 0.3s Time] [2022-03-01 17:35:24,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2022-03-01 17:35:24,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1573. [2022-03-01 17:35:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1573 states, 1572 states have (on average 3.3365139949109417) internal successors, (5245), 1572 states have internal predecessors, (5245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:24,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1573 states to 1573 states and 5245 transitions. [2022-03-01 17:35:24,493 INFO L78 Accepts]: Start accepts. Automaton has 1573 states and 5245 transitions. Word has length 24 [2022-03-01 17:35:24,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:24,493 INFO L470 AbstractCegarLoop]: Abstraction has 1573 states and 5245 transitions. [2022-03-01 17:35:24,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:24,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1573 states and 5245 transitions. [2022-03-01 17:35:24,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:24,495 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:24,495 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:24,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-03-01 17:35:24,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2022-03-01 17:35:24,696 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:24,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:24,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1439692417, now seen corresponding path program 201 times [2022-03-01 17:35:24,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:24,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104889478] [2022-03-01 17:35:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:24,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:24,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:24,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:24,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104889478] [2022-03-01 17:35:24,925 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104889478] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:24,925 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987163059] [2022-03-01 17:35:24,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:35:24,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:24,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:24,926 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:24,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-01 17:35:24,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:35:24,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:24,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:24,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:25,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:35:25,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:25,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:35:25,117 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:25,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:35:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:25,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:25,803 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:25,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-03-01 17:35:25,941 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:25,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:35:25,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:25,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:35:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:25,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987163059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:25,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:25,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:25,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249900532] [2022-03-01 17:35:25,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:25,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:25,998 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:25,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:25,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:25,999 INFO L87 Difference]: Start difference. First operand 1573 states and 5245 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:26,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:26,942 INFO L93 Difference]: Finished difference Result 1748 states and 5738 transitions. [2022-03-01 17:35:26,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:35:26,942 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:26,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:26,945 INFO L225 Difference]: With dead ends: 1748 [2022-03-01 17:35:26,945 INFO L226 Difference]: Without dead ends: 1663 [2022-03-01 17:35:26,945 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=137, Invalid=919, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:35:26,945 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 90 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:26,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 278 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 860 Invalid, 0 Unknown, 94 Unchecked, 0.4s Time] [2022-03-01 17:35:26,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1663 states. [2022-03-01 17:35:26,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1663 to 1580. [2022-03-01 17:35:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.339455351488284) internal successors, (5273), 1579 states have internal predecessors, (5273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:26,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5273 transitions. [2022-03-01 17:35:26,964 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5273 transitions. Word has length 24 [2022-03-01 17:35:26,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:26,964 INFO L470 AbstractCegarLoop]: Abstraction has 1580 states and 5273 transitions. [2022-03-01 17:35:26,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:26,964 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5273 transitions. [2022-03-01 17:35:26,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:26,966 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:26,966 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:26,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-03-01 17:35:27,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:27,167 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:27,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:27,167 INFO L85 PathProgramCache]: Analyzing trace with hash -108871757, now seen corresponding path program 202 times [2022-03-01 17:35:27,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:27,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438215789] [2022-03-01 17:35:27,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:27,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:27,366 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:27,366 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:27,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438215789] [2022-03-01 17:35:27,366 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438215789] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:27,366 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776681280] [2022-03-01 17:35:27,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:35:27,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:27,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:27,367 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:27,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-01 17:35:27,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:35:27,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:27,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:27,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:27,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:35:27,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:27,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:35:27,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:27,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 8 [2022-03-01 17:35:27,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:27,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:28,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:28,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:35:28,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:28,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-01 17:35:28,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:28,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 17:35:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:28,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776681280] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:28,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:28,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:28,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361679501] [2022-03-01 17:35:28,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:28,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:28,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:28,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:28,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:28,661 INFO L87 Difference]: Start difference. First operand 1580 states and 5273 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:28,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:28,926 INFO L93 Difference]: Finished difference Result 1671 states and 5521 transitions. [2022-03-01 17:35:28,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:35:28,927 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:28,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:28,930 INFO L225 Difference]: With dead ends: 1671 [2022-03-01 17:35:28,930 INFO L226 Difference]: Without dead ends: 1640 [2022-03-01 17:35:28,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:28,930 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 56 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:28,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 220 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 594 Invalid, 0 Unknown, 98 Unchecked, 0.3s Time] [2022-03-01 17:35:28,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2022-03-01 17:35:28,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1594. [2022-03-01 17:35:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1593 states have (on average 3.332705586942875) internal successors, (5309), 1593 states have internal predecessors, (5309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:28,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 5309 transitions. [2022-03-01 17:35:28,949 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 5309 transitions. Word has length 24 [2022-03-01 17:35:28,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:28,949 INFO L470 AbstractCegarLoop]: Abstraction has 1594 states and 5309 transitions. [2022-03-01 17:35:28,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:28,949 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 5309 transitions. [2022-03-01 17:35:28,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:28,951 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:28,951 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:28,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-03-01 17:35:29,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-03-01 17:35:29,152 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:29,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:29,152 INFO L85 PathProgramCache]: Analyzing trace with hash -784253685, now seen corresponding path program 203 times [2022-03-01 17:35:29,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:29,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955328619] [2022-03-01 17:35:29,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:29,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:29,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:29,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:29,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955328619] [2022-03-01 17:35:29,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955328619] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:29,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529138170] [2022-03-01 17:35:29,346 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:35:29,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:29,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:29,347 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:29,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-01 17:35:29,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:35:29,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:29,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:29,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:29,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:35:29,661 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:29,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:35:29,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:29,664 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:35:29,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:29,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:30,269 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:30,269 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 75 [2022-03-01 17:35:30,383 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:30,383 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:35:30,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:30,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:35:30,437 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:30,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529138170] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:30,438 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:30,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:30,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244269773] [2022-03-01 17:35:30,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:30,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:30,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:30,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:30,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:30,438 INFO L87 Difference]: Start difference. First operand 1594 states and 5309 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:31,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:31,016 INFO L93 Difference]: Finished difference Result 1651 states and 5469 transitions. [2022-03-01 17:35:31,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:35:31,017 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:31,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:31,019 INFO L225 Difference]: With dead ends: 1651 [2022-03-01 17:35:31,019 INFO L226 Difference]: Without dead ends: 1648 [2022-03-01 17:35:31,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:35:31,020 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 64 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:31,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 253 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 756 Invalid, 0 Unknown, 19 Unchecked, 0.3s Time] [2022-03-01 17:35:31,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1648 states. [2022-03-01 17:35:31,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1648 to 1591. [2022-03-01 17:35:31,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.3345911949685534) internal successors, (5302), 1590 states have internal predecessors, (5302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5302 transitions. [2022-03-01 17:35:31,038 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5302 transitions. Word has length 24 [2022-03-01 17:35:31,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:31,038 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 5302 transitions. [2022-03-01 17:35:31,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:31,038 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5302 transitions. [2022-03-01 17:35:31,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:31,040 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:31,040 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:31,056 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-03-01 17:35:31,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable218 [2022-03-01 17:35:31,240 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:31,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:31,241 INFO L85 PathProgramCache]: Analyzing trace with hash 423732269, now seen corresponding path program 204 times [2022-03-01 17:35:31,241 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:31,241 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167161302] [2022-03-01 17:35:31,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:31,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:31,431 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:31,431 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:31,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167161302] [2022-03-01 17:35:31,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167161302] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:31,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811873308] [2022-03-01 17:35:31,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:35:31,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:31,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:31,432 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:31,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-01 17:35:31,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:35:31,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:31,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:35:31,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:31,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:35:31,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:31,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:31,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:31,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:35:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:31,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:32,468 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:32,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-03-01 17:35:32,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:32,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 46 [2022-03-01 17:35:32,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:32,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 38 [2022-03-01 17:35:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:32,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811873308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:32,654 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:32,654 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:32,654 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564412676] [2022-03-01 17:35:32,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:32,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:32,654 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:32,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:32,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:32,655 INFO L87 Difference]: Start difference. First operand 1591 states and 5302 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:33,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:33,025 INFO L93 Difference]: Finished difference Result 1694 states and 5548 transitions. [2022-03-01 17:35:33,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:35:33,025 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:33,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:33,028 INFO L225 Difference]: With dead ends: 1694 [2022-03-01 17:35:33,028 INFO L226 Difference]: Without dead ends: 1611 [2022-03-01 17:35:33,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=565, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:35:33,028 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 65 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:33,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 245 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 744 Invalid, 0 Unknown, 105 Unchecked, 0.3s Time] [2022-03-01 17:35:33,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-03-01 17:35:33,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1574. [2022-03-01 17:35:33,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 3.3363000635727906) internal successors, (5248), 1573 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:33,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 5248 transitions. [2022-03-01 17:35:33,046 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 5248 transitions. Word has length 24 [2022-03-01 17:35:33,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:33,046 INFO L470 AbstractCegarLoop]: Abstraction has 1574 states and 5248 transitions. [2022-03-01 17:35:33,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:33,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 5248 transitions. [2022-03-01 17:35:33,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:33,048 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:33,048 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:33,064 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-03-01 17:35:33,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:33,248 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:33,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:33,249 INFO L85 PathProgramCache]: Analyzing trace with hash -593274527, now seen corresponding path program 205 times [2022-03-01 17:35:33,249 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:33,249 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503974182] [2022-03-01 17:35:33,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:33,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:33,482 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:33,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:33,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503974182] [2022-03-01 17:35:33,483 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503974182] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:33,483 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146063555] [2022-03-01 17:35:33,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:35:33,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:33,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:33,488 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:33,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-03-01 17:35:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:33,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:33,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:33,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:35:33,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:33,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 45 [2022-03-01 17:35:33,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:33,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 31 [2022-03-01 17:35:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:34,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:34,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:34,505 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:35:34,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:34,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2022-03-01 17:35:34,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:34,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2022-03-01 17:35:34,758 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:34,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146063555] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:34,758 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:34,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:34,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454155502] [2022-03-01 17:35:34,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:34,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:34,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:34,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:34,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:34,759 INFO L87 Difference]: Start difference. First operand 1574 states and 5248 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:35,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:35,421 INFO L93 Difference]: Finished difference Result 1747 states and 5671 transitions. [2022-03-01 17:35:35,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:35:35,421 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:35,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:35,424 INFO L225 Difference]: With dead ends: 1747 [2022-03-01 17:35:35,424 INFO L226 Difference]: Without dead ends: 1673 [2022-03-01 17:35:35,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:35:35,424 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 84 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 248 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:35,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 298 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 765 Invalid, 0 Unknown, 248 Unchecked, 0.3s Time] [2022-03-01 17:35:35,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2022-03-01 17:35:35,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1586. [2022-03-01 17:35:35,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 3.3324921135646686) internal successors, (5282), 1585 states have internal predecessors, (5282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 5282 transitions. [2022-03-01 17:35:35,443 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 5282 transitions. Word has length 24 [2022-03-01 17:35:35,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:35,443 INFO L470 AbstractCegarLoop]: Abstraction has 1586 states and 5282 transitions. [2022-03-01 17:35:35,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:35,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 5282 transitions. [2022-03-01 17:35:35,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:35,445 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:35,445 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:35,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-03-01 17:35:35,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:35,646 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:35,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:35,646 INFO L85 PathProgramCache]: Analyzing trace with hash -376526239, now seen corresponding path program 206 times [2022-03-01 17:35:35,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:35,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271993783] [2022-03-01 17:35:35,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:35,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:35:35,842 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:35,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271993783] [2022-03-01 17:35:35,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271993783] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:35,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068004763] [2022-03-01 17:35:35,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:35:35,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:35,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:35,843 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:35,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-03-01 17:35:35,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:35:35,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:35,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:35,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:35,978 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:35,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:35:36,368 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:36,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:35:36,371 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:36,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:35:36,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:35:36,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:37,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:37,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:35:37,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:37,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:35:37,238 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:37,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:35:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:35:37,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068004763] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:37,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:37,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:35:37,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483646295] [2022-03-01 17:35:37,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:37,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:35:37,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:37,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:35:37,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:35:37,296 INFO L87 Difference]: Start difference. First operand 1586 states and 5282 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:37,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:37,551 INFO L93 Difference]: Finished difference Result 1640 states and 5426 transitions. [2022-03-01 17:35:37,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:35:37,551 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:37,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:37,554 INFO L225 Difference]: With dead ends: 1640 [2022-03-01 17:35:37,554 INFO L226 Difference]: Without dead ends: 1621 [2022-03-01 17:35:37,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:35:37,554 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 38 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:37,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 186 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 591 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-03-01 17:35:37,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2022-03-01 17:35:37,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1574. [2022-03-01 17:35:37,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 3.3363000635727906) internal successors, (5248), 1573 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:37,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 5248 transitions. [2022-03-01 17:35:37,572 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 5248 transitions. Word has length 24 [2022-03-01 17:35:37,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:37,572 INFO L470 AbstractCegarLoop]: Abstraction has 1574 states and 5248 transitions. [2022-03-01 17:35:37,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 5248 transitions. [2022-03-01 17:35:37,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:37,574 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:37,574 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:37,590 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Forceful destruction successful, exit code 0 [2022-03-01 17:35:37,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-03-01 17:35:37,775 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:37,775 INFO L85 PathProgramCache]: Analyzing trace with hash 95735659, now seen corresponding path program 207 times [2022-03-01 17:35:37,775 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:37,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722494661] [2022-03-01 17:35:37,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:37,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:37,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:37,967 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:37,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722494661] [2022-03-01 17:35:37,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722494661] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:37,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220666023] [2022-03-01 17:35:37,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:35:37,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:37,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:37,968 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:37,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-03-01 17:35:37,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:35:37,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:37,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:37,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:38,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:35:38,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:38,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:35:38,266 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:38,267 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:35:38,332 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:38,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:38,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:38,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:35:39,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:39,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2022-03-01 17:35:39,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:39,018 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2022-03-01 17:35:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:39,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220666023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:39,068 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:39,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:39,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391924326] [2022-03-01 17:35:39,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:39,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:39,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:39,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:39,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:39,069 INFO L87 Difference]: Start difference. First operand 1574 states and 5248 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:39,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:39,568 INFO L93 Difference]: Finished difference Result 1680 states and 5538 transitions. [2022-03-01 17:35:39,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:35:39,568 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:39,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:39,571 INFO L225 Difference]: With dead ends: 1680 [2022-03-01 17:35:39,571 INFO L226 Difference]: Without dead ends: 1649 [2022-03-01 17:35:39,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=612, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:35:39,572 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 486 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:39,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 250 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 816 Invalid, 0 Unknown, 216 Unchecked, 0.3s Time] [2022-03-01 17:35:39,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2022-03-01 17:35:39,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1574. [2022-03-01 17:35:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1574 states, 1573 states have (on average 3.3363000635727906) internal successors, (5248), 1573 states have internal predecessors, (5248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:39,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1574 states to 1574 states and 5248 transitions. [2022-03-01 17:35:39,590 INFO L78 Accepts]: Start accepts. Automaton has 1574 states and 5248 transitions. Word has length 24 [2022-03-01 17:35:39,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:39,590 INFO L470 AbstractCegarLoop]: Abstraction has 1574 states and 5248 transitions. [2022-03-01 17:35:39,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:39,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1574 states and 5248 transitions. [2022-03-01 17:35:39,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:39,592 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:39,592 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:39,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-03-01 17:35:39,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-03-01 17:35:39,792 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:39,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:39,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1974379607, now seen corresponding path program 208 times [2022-03-01 17:35:39,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:39,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856546741] [2022-03-01 17:35:39,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:39,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:39,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:35:40,109 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:40,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856546741] [2022-03-01 17:35:40,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856546741] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:40,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310858741] [2022-03-01 17:35:40,109 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:35:40,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:40,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:40,110 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:40,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-03-01 17:35:40,137 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:35:40,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:40,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:35:40,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:40,212 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:40,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:35:40,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:40,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-01 17:35:40,362 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-03-01 17:35:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:40,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:41,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:41,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 123 [2022-03-01 17:35:41,452 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:41,452 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 98 [2022-03-01 17:35:41,458 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:41,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 76 [2022-03-01 17:35:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:41,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310858741] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:41,554 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:41,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 26 [2022-03-01 17:35:41,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602920157] [2022-03-01 17:35:41,554 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:41,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:35:41,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:41,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:35:41,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:35:41,554 INFO L87 Difference]: Start difference. First operand 1574 states and 5248 transitions. Second operand has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:42,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:42,234 INFO L93 Difference]: Finished difference Result 1744 states and 5719 transitions. [2022-03-01 17:35:42,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:35:42,235 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:42,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:42,238 INFO L225 Difference]: With dead ends: 1744 [2022-03-01 17:35:42,238 INFO L226 Difference]: Without dead ends: 1699 [2022-03-01 17:35:42,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:35:42,238 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 78 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 1025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 237 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:42,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 240 Invalid, 1025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 763 Invalid, 0 Unknown, 237 Unchecked, 0.3s Time] [2022-03-01 17:35:42,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-03-01 17:35:42,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1580. [2022-03-01 17:35:42,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 3.33692210259658) internal successors, (5269), 1579 states have internal predecessors, (5269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 5269 transitions. [2022-03-01 17:35:42,256 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 5269 transitions. Word has length 24 [2022-03-01 17:35:42,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:42,256 INFO L470 AbstractCegarLoop]: Abstraction has 1580 states and 5269 transitions. [2022-03-01 17:35:42,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.076923076923077) internal successors, (54), 26 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:42,256 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 5269 transitions. [2022-03-01 17:35:42,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:42,258 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:42,258 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:42,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-03-01 17:35:42,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-03-01 17:35:42,459 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:42,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:42,459 INFO L85 PathProgramCache]: Analyzing trace with hash 809937343, now seen corresponding path program 209 times [2022-03-01 17:35:42,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:42,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532288463] [2022-03-01 17:35:42,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:42,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:42,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:42,699 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:42,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532288463] [2022-03-01 17:35:42,699 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532288463] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:42,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637004012] [2022-03-01 17:35:42,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:35:42,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:42,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:42,700 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:42,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-03-01 17:35:42,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:35:42,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:42,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:42,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:42,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:42,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:35:42,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:42,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-01 17:35:42,916 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:42,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-03-01 17:35:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:43,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:43,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:43,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 120 [2022-03-01 17:35:43,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:43,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 74 [2022-03-01 17:35:43,686 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:43,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 58 [2022-03-01 17:35:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:43,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637004012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:43,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:43,825 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:43,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828559396] [2022-03-01 17:35:43,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:43,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:43,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:43,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:43,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:43,826 INFO L87 Difference]: Start difference. First operand 1580 states and 5269 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:44,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:44,440 INFO L93 Difference]: Finished difference Result 1659 states and 5500 transitions. [2022-03-01 17:35:44,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:35:44,440 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:44,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:44,443 INFO L225 Difference]: With dead ends: 1659 [2022-03-01 17:35:44,443 INFO L226 Difference]: Without dead ends: 1624 [2022-03-01 17:35:44,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:35:44,443 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:44,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 236 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 692 Invalid, 0 Unknown, 153 Unchecked, 0.3s Time] [2022-03-01 17:35:44,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2022-03-01 17:35:44,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1576. [2022-03-01 17:35:44,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.3377777777777777) internal successors, (5257), 1575 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:44,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5257 transitions. [2022-03-01 17:35:44,461 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5257 transitions. Word has length 24 [2022-03-01 17:35:44,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:44,462 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 5257 transitions. [2022-03-01 17:35:44,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:44,462 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5257 transitions. [2022-03-01 17:35:44,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:44,464 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:44,464 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:44,479 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-03-01 17:35:44,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2022-03-01 17:35:44,664 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:44,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:44,664 INFO L85 PathProgramCache]: Analyzing trace with hash -38685129, now seen corresponding path program 210 times [2022-03-01 17:35:44,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:44,665 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024012245] [2022-03-01 17:35:44,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:44,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:44,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:44,927 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:44,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:44,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024012245] [2022-03-01 17:35:44,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024012245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:44,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393360887] [2022-03-01 17:35:44,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:35:44,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:44,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:44,929 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:44,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-03-01 17:35:44,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:35:44,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:44,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:44,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:45,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:45,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:35:45,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:45,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-03-01 17:35:45,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:45,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:35:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:45,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:45,821 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:45,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2022-03-01 17:35:46,015 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:46,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 126 [2022-03-01 17:35:46,021 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:46,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 98 [2022-03-01 17:35:46,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:46,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393360887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:46,136 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:46,136 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:46,136 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951612196] [2022-03-01 17:35:46,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:46,136 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:46,136 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:46,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:46,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:46,137 INFO L87 Difference]: Start difference. First operand 1576 states and 5257 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:46,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:46,480 INFO L93 Difference]: Finished difference Result 1650 states and 5461 transitions. [2022-03-01 17:35:46,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:35:46,481 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:46,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:46,483 INFO L225 Difference]: With dead ends: 1650 [2022-03-01 17:35:46,483 INFO L226 Difference]: Without dead ends: 1611 [2022-03-01 17:35:46,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:35:46,484 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 270 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:46,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 209 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 471 Invalid, 0 Unknown, 270 Unchecked, 0.2s Time] [2022-03-01 17:35:46,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-03-01 17:35:46,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1576. [2022-03-01 17:35:46,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.3377777777777777) internal successors, (5257), 1575 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:46,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5257 transitions. [2022-03-01 17:35:46,501 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5257 transitions. Word has length 24 [2022-03-01 17:35:46,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:46,501 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 5257 transitions. [2022-03-01 17:35:46,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:46,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5257 transitions. [2022-03-01 17:35:46,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:46,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:46,503 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:46,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Ended with exit code 0 [2022-03-01 17:35:46,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2022-03-01 17:35:46,704 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:46,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:46,704 INFO L85 PathProgramCache]: Analyzing trace with hash -2012036845, now seen corresponding path program 211 times [2022-03-01 17:35:46,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:46,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953520989] [2022-03-01 17:35:46,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:46,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:46,919 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:46,919 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:46,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953520989] [2022-03-01 17:35:46,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953520989] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:46,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084557059] [2022-03-01 17:35:46,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:35:46,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:46,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:46,921 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:46,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-03-01 17:35:46,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:46,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:35:46,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:47,044 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:47,044 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:35:47,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:47,115 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-01 17:35:47,118 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:47,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:35:47,341 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:47,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:48,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:48,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 123 [2022-03-01 17:35:48,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:48,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 98 [2022-03-01 17:35:48,291 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:48,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 76 [2022-03-01 17:35:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:48,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084557059] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:48,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:48,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:35:48,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438041847] [2022-03-01 17:35:48,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:48,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:35:48,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:48,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:35:48,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:35:48,388 INFO L87 Difference]: Start difference. First operand 1576 states and 5257 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:49,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:49,925 INFO L93 Difference]: Finished difference Result 2127 states and 6669 transitions. [2022-03-01 17:35:49,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:35:49,925 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:49,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:49,928 INFO L225 Difference]: With dead ends: 2127 [2022-03-01 17:35:49,929 INFO L226 Difference]: Without dead ends: 1954 [2022-03-01 17:35:49,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:35:49,929 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 202 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:49,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 229 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 763 Invalid, 0 Unknown, 121 Unchecked, 0.4s Time] [2022-03-01 17:35:49,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1954 states. [2022-03-01 17:35:49,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1954 to 1576. [2022-03-01 17:35:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.3377777777777777) internal successors, (5257), 1575 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:49,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5257 transitions. [2022-03-01 17:35:49,951 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5257 transitions. Word has length 24 [2022-03-01 17:35:49,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:49,951 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 5257 transitions. [2022-03-01 17:35:49,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:49,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5257 transitions. [2022-03-01 17:35:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:49,953 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:49,953 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:49,969 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-03-01 17:35:50,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:50,153 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:50,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:50,154 INFO L85 PathProgramCache]: Analyzing trace with hash 249963507, now seen corresponding path program 212 times [2022-03-01 17:35:50,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:50,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032906935] [2022-03-01 17:35:50,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:50,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:50,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:50,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032906935] [2022-03-01 17:35:50,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032906935] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:50,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531454674] [2022-03-01 17:35:50,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:35:50,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:50,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:50,377 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:50,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-03-01 17:35:50,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:35:50,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:50,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:50,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:50,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:50,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:35:50,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:50,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:35:50,654 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:50,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:35:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:50,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:51,211 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:51,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-01 17:35:51,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:51,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 126 [2022-03-01 17:35:51,462 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:51,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 98 [2022-03-01 17:35:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:51,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531454674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:51,569 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:51,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:51,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537441379] [2022-03-01 17:35:51,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:51,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:51,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:51,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:51,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:51,570 INFO L87 Difference]: Start difference. First operand 1576 states and 5257 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:51,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:51,997 INFO L93 Difference]: Finished difference Result 1650 states and 5459 transitions. [2022-03-01 17:35:51,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:35:51,997 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:51,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:52,000 INFO L225 Difference]: With dead ends: 1650 [2022-03-01 17:35:52,000 INFO L226 Difference]: Without dead ends: 1611 [2022-03-01 17:35:52,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:35:52,000 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:52,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 291 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 605 Invalid, 0 Unknown, 239 Unchecked, 0.3s Time] [2022-03-01 17:35:52,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-03-01 17:35:52,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1578. [2022-03-01 17:35:52,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1578 states, 1577 states have (on average 3.336715282181357) internal successors, (5262), 1577 states have internal predecessors, (5262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:52,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1578 states to 1578 states and 5262 transitions. [2022-03-01 17:35:52,021 INFO L78 Accepts]: Start accepts. Automaton has 1578 states and 5262 transitions. Word has length 24 [2022-03-01 17:35:52,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:52,021 INFO L470 AbstractCegarLoop]: Abstraction has 1578 states and 5262 transitions. [2022-03-01 17:35:52,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:52,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1578 states and 5262 transitions. [2022-03-01 17:35:52,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:52,024 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:52,024 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:52,040 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-03-01 17:35:52,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:52,224 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:52,224 INFO L85 PathProgramCache]: Analyzing trace with hash -848461897, now seen corresponding path program 213 times [2022-03-01 17:35:52,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:52,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952164659] [2022-03-01 17:35:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:52,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:52,465 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:52,465 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:52,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952164659] [2022-03-01 17:35:52,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952164659] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:52,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799544547] [2022-03-01 17:35:52,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:35:52,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:52,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:52,467 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:52,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-03-01 17:35:52,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:35:52,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:52,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:52,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:52,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:52,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:35:52,706 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:52,706 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-01 17:35:52,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:52,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:35:52,836 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:52,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:53,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:53,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 122 [2022-03-01 17:35:53,582 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:53,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 69 [2022-03-01 17:35:53,587 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:53,587 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 53 [2022-03-01 17:35:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:53,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799544547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:53,686 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:53,686 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:53,686 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121792304] [2022-03-01 17:35:53,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:53,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:53,687 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:53,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:53,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:53,687 INFO L87 Difference]: Start difference. First operand 1578 states and 5262 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:54,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:54,421 INFO L93 Difference]: Finished difference Result 1728 states and 5621 transitions. [2022-03-01 17:35:54,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:35:54,421 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:54,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:54,424 INFO L225 Difference]: With dead ends: 1728 [2022-03-01 17:35:54,424 INFO L226 Difference]: Without dead ends: 1635 [2022-03-01 17:35:54,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:35:54,425 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 74 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 225 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:54,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 280 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 752 Invalid, 0 Unknown, 225 Unchecked, 0.3s Time] [2022-03-01 17:35:54,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2022-03-01 17:35:54,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1576. [2022-03-01 17:35:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1576 states, 1575 states have (on average 3.3377777777777777) internal successors, (5257), 1575 states have internal predecessors, (5257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:54,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1576 states to 1576 states and 5257 transitions. [2022-03-01 17:35:54,443 INFO L78 Accepts]: Start accepts. Automaton has 1576 states and 5257 transitions. Word has length 24 [2022-03-01 17:35:54,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:54,443 INFO L470 AbstractCegarLoop]: Abstraction has 1576 states and 5257 transitions. [2022-03-01 17:35:54,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:54,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1576 states and 5257 transitions. [2022-03-01 17:35:54,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:54,445 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:54,446 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:54,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-03-01 17:35:54,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-03-01 17:35:54,646 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:54,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:54,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1606762527, now seen corresponding path program 214 times [2022-03-01 17:35:54,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:54,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361857341] [2022-03-01 17:35:54,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:54,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:54,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:54,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:54,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:54,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361857341] [2022-03-01 17:35:54,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361857341] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:54,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426979147] [2022-03-01 17:35:54,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:35:54,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:54,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:54,890 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:54,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-03-01 17:35:54,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:35:54,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:54,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:35:54,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:55,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:35:55,078 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:55,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:35:55,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:55,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:35:55,304 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:55,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:55,967 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:55,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 67 [2022-03-01 17:35:56,075 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:56,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 93 [2022-03-01 17:35:56,081 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:56,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 73 [2022-03-01 17:35:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:56,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426979147] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:56,190 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:56,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:56,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692411716] [2022-03-01 17:35:56,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:56,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:56,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:56,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:56,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:56,191 INFO L87 Difference]: Start difference. First operand 1576 states and 5257 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:57,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:57,425 INFO L93 Difference]: Finished difference Result 1971 states and 6273 transitions. [2022-03-01 17:35:57,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:35:57,425 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:57,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:57,428 INFO L225 Difference]: With dead ends: 1971 [2022-03-01 17:35:57,428 INFO L226 Difference]: Without dead ends: 1798 [2022-03-01 17:35:57,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:35:57,429 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 174 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:57,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 260 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 753 Invalid, 0 Unknown, 4 Unchecked, 0.3s Time] [2022-03-01 17:35:57,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1798 states. [2022-03-01 17:35:57,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1798 to 1583. [2022-03-01 17:35:57,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 3.3400758533501897) internal successors, (5284), 1582 states have internal predecessors, (5284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:57,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 5284 transitions. [2022-03-01 17:35:57,449 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 5284 transitions. Word has length 24 [2022-03-01 17:35:57,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:57,449 INFO L470 AbstractCegarLoop]: Abstraction has 1583 states and 5284 transitions. [2022-03-01 17:35:57,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:57,449 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 5284 transitions. [2022-03-01 17:35:57,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:57,451 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:57,451 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:57,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Forceful destruction successful, exit code 0 [2022-03-01 17:35:57,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:57,651 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:35:57,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:57,652 INFO L85 PathProgramCache]: Analyzing trace with hash -1722283241, now seen corresponding path program 215 times [2022-03-01 17:35:57,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:57,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686756455] [2022-03-01 17:35:57,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:57,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:57,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:57,901 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:57,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:57,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686756455] [2022-03-01 17:35:57,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686756455] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:57,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411267880] [2022-03-01 17:35:57,901 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:35:57,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:57,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:57,902 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:57,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-03-01 17:35:57,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:35:57,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:57,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:57,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:58,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:58,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:35:58,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:58,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:35:58,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:58,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:35:58,277 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:58,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:58,829 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:58,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 68 [2022-03-01 17:35:58,924 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:58,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 69 [2022-03-01 17:35:58,929 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:35:58,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 53 [2022-03-01 17:35:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:35:59,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411267880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:59,052 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:59,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:35:59,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343306683] [2022-03-01 17:35:59,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:59,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:35:59,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:59,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:35:59,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:59,053 INFO L87 Difference]: Start difference. First operand 1583 states and 5284 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:59,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:59,872 INFO L93 Difference]: Finished difference Result 1746 states and 5741 transitions. [2022-03-01 17:35:59,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:35:59,872 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:35:59,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:59,875 INFO L225 Difference]: With dead ends: 1746 [2022-03-01 17:35:59,875 INFO L226 Difference]: Without dead ends: 1661 [2022-03-01 17:35:59,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:35:59,876 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 110 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:59,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 196 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 583 Invalid, 0 Unknown, 110 Unchecked, 0.3s Time] [2022-03-01 17:35:59,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2022-03-01 17:35:59,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1590. [2022-03-01 17:35:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1590 states, 1589 states have (on average 3.342983008181246) internal successors, (5312), 1589 states have internal predecessors, (5312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:59,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1590 states to 1590 states and 5312 transitions. [2022-03-01 17:35:59,895 INFO L78 Accepts]: Start accepts. Automaton has 1590 states and 5312 transitions. Word has length 24 [2022-03-01 17:35:59,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:59,895 INFO L470 AbstractCegarLoop]: Abstraction has 1590 states and 5312 transitions. [2022-03-01 17:35:59,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:59,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1590 states and 5312 transitions. [2022-03-01 17:35:59,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:35:59,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:59,897 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:59,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Forceful destruction successful, exit code 0 [2022-03-01 17:36:00,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:00,098 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:00,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:00,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1024119881, now seen corresponding path program 216 times [2022-03-01 17:36:00,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:00,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023653040] [2022-03-01 17:36:00,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:00,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:00,306 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:00,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:00,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023653040] [2022-03-01 17:36:00,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023653040] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:00,306 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808093621] [2022-03-01 17:36:00,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:36:00,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:00,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:00,308 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:00,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-03-01 17:36:00,336 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:36:00,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:00,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:36:00,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:00,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:00,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:00,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:36:00,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:00,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 8 [2022-03-01 17:36:00,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:00,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:01,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:01,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-03-01 17:36:01,513 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:01,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 108 [2022-03-01 17:36:01,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:01,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 86 [2022-03-01 17:36:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:01,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808093621] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:01,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:01,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:01,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639771165] [2022-03-01 17:36:01,622 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:01,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:01,622 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:01,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:01,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:01,622 INFO L87 Difference]: Start difference. First operand 1590 states and 5312 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:02,043 INFO L93 Difference]: Finished difference Result 1776 states and 5790 transitions. [2022-03-01 17:36:02,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:36:02,043 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:02,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:02,046 INFO L225 Difference]: With dead ends: 1776 [2022-03-01 17:36:02,046 INFO L226 Difference]: Without dead ends: 1699 [2022-03-01 17:36:02,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:36:02,047 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 62 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:02,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 278 Invalid, 728 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 652 Invalid, 0 Unknown, 68 Unchecked, 0.3s Time] [2022-03-01 17:36:02,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-03-01 17:36:02,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1639. [2022-03-01 17:36:02,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1639 states, 1638 states have (on average 3.3180708180708183) internal successors, (5435), 1638 states have internal predecessors, (5435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:02,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1639 states to 1639 states and 5435 transitions. [2022-03-01 17:36:02,066 INFO L78 Accepts]: Start accepts. Automaton has 1639 states and 5435 transitions. Word has length 24 [2022-03-01 17:36:02,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:02,066 INFO L470 AbstractCegarLoop]: Abstraction has 1639 states and 5435 transitions. [2022-03-01 17:36:02,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:02,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1639 states and 5435 transitions. [2022-03-01 17:36:02,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:02,069 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:02,069 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:02,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-03-01 17:36:02,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:02,269 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:02,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:02,270 INFO L85 PathProgramCache]: Analyzing trace with hash 348737953, now seen corresponding path program 217 times [2022-03-01 17:36:02,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:02,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534478053] [2022-03-01 17:36:02,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:02,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:02,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:02,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534478053] [2022-03-01 17:36:02,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534478053] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:02,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120338461] [2022-03-01 17:36:02,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:36:02,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:02,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:02,479 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:02,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-03-01 17:36:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:02,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:36:02,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:02,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:02,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:02,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:36:02,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:02,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 8 [2022-03-01 17:36:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:02,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:03,524 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:03,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 74 [2022-03-01 17:36:03,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:03,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 108 [2022-03-01 17:36:03,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:03,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 86 [2022-03-01 17:36:03,804 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:03,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120338461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:03,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:03,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:03,804 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445042045] [2022-03-01 17:36:03,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:03,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:03,804 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:03,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:03,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:03,805 INFO L87 Difference]: Start difference. First operand 1639 states and 5435 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:04,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:04,219 INFO L93 Difference]: Finished difference Result 1709 states and 5613 transitions. [2022-03-01 17:36:04,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:36:04,220 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:04,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:04,222 INFO L225 Difference]: With dead ends: 1709 [2022-03-01 17:36:04,222 INFO L226 Difference]: Without dead ends: 1699 [2022-03-01 17:36:04,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:36:04,223 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:04,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 263 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 681 Invalid, 0 Unknown, 146 Unchecked, 0.3s Time] [2022-03-01 17:36:04,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-03-01 17:36:04,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1619. [2022-03-01 17:36:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1618 states have (on average 3.3288009888751544) internal successors, (5386), 1618 states have internal predecessors, (5386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:04,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 5386 transitions. [2022-03-01 17:36:04,241 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 5386 transitions. Word has length 24 [2022-03-01 17:36:04,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:04,242 INFO L470 AbstractCegarLoop]: Abstraction has 1619 states and 5386 transitions. [2022-03-01 17:36:04,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:04,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 5386 transitions. [2022-03-01 17:36:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:04,244 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:04,244 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:04,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-03-01 17:36:04,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-03-01 17:36:04,444 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:04,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:04,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1556723907, now seen corresponding path program 218 times [2022-03-01 17:36:04,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:04,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520027563] [2022-03-01 17:36:04,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:04,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:04,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:04,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:04,668 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:04,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520027563] [2022-03-01 17:36:04,668 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520027563] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:04,668 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397873126] [2022-03-01 17:36:04,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:36:04,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:04,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:04,670 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:04,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-03-01 17:36:04,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:36:04,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:04,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:04,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:04,794 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:04,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:05,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:05,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:36:05,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:05,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:36:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:05,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:05,893 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:05,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-01 17:36:06,032 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:06,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 144 treesize of output 124 [2022-03-01 17:36:06,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:06,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 96 [2022-03-01 17:36:06,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:06,153 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397873126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:06,153 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:06,153 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:06,153 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577074222] [2022-03-01 17:36:06,153 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:06,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:06,153 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:06,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:06,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:06,154 INFO L87 Difference]: Start difference. First operand 1619 states and 5386 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:06,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:06,348 INFO L93 Difference]: Finished difference Result 1657 states and 5490 transitions. [2022-03-01 17:36:06,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:36:06,348 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:06,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:06,351 INFO L225 Difference]: With dead ends: 1657 [2022-03-01 17:36:06,352 INFO L226 Difference]: Without dead ends: 1650 [2022-03-01 17:36:06,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:06,352 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:06,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 206 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 433 Invalid, 0 Unknown, 254 Unchecked, 0.2s Time] [2022-03-01 17:36:06,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2022-03-01 17:36:06,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1621. [2022-03-01 17:36:06,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.3271604938271606) internal successors, (5390), 1620 states have internal predecessors, (5390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5390 transitions. [2022-03-01 17:36:06,371 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5390 transitions. Word has length 24 [2022-03-01 17:36:06,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:06,371 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 5390 transitions. [2022-03-01 17:36:06,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5390 transitions. [2022-03-01 17:36:06,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:06,374 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:06,374 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:06,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-03-01 17:36:06,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2022-03-01 17:36:06,574 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:06,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:06,574 INFO L85 PathProgramCache]: Analyzing trace with hash 881341979, now seen corresponding path program 219 times [2022-03-01 17:36:06,574 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:06,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257725869] [2022-03-01 17:36:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:06,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:06,793 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:06,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:06,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257725869] [2022-03-01 17:36:06,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257725869] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:06,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745041477] [2022-03-01 17:36:06,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:36:06,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:06,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:06,795 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:06,795 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-03-01 17:36:06,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:36:06,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:06,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:36:06,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:06,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:06,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:07,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:07,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:36:07,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:07,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:36:07,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:07,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:08,071 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:08,072 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2022-03-01 17:36:08,230 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:08,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 108 [2022-03-01 17:36:08,237 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:08,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 86 [2022-03-01 17:36:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:08,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745041477] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:08,328 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:08,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:08,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474819677] [2022-03-01 17:36:08,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:08,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:08,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:08,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:08,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:08,329 INFO L87 Difference]: Start difference. First operand 1621 states and 5390 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:08,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:08,608 INFO L93 Difference]: Finished difference Result 1655 states and 5480 transitions. [2022-03-01 17:36:08,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:36:08,608 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:08,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:08,611 INFO L225 Difference]: With dead ends: 1655 [2022-03-01 17:36:08,611 INFO L226 Difference]: Without dead ends: 1641 [2022-03-01 17:36:08,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:36:08,612 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 33 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:08,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 186 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 519 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-03-01 17:36:08,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1641 states. [2022-03-01 17:36:08,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1641 to 1613. [2022-03-01 17:36:08,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 3.332506203473945) internal successors, (5372), 1612 states have internal predecessors, (5372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:08,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 5372 transitions. [2022-03-01 17:36:08,631 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 5372 transitions. Word has length 24 [2022-03-01 17:36:08,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:08,631 INFO L470 AbstractCegarLoop]: Abstraction has 1613 states and 5372 transitions. [2022-03-01 17:36:08,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:08,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 5372 transitions. [2022-03-01 17:36:08,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:08,633 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:08,633 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:08,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-03-01 17:36:08,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-03-01 17:36:08,834 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:08,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:08,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1536230813, now seen corresponding path program 220 times [2022-03-01 17:36:08,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:08,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541191256] [2022-03-01 17:36:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:08,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:09,050 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:36:09,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:09,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541191256] [2022-03-01 17:36:09,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541191256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:09,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794131100] [2022-03-01 17:36:09,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:36:09,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:09,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:09,052 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:09,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-03-01 17:36:09,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:36:09,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:09,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:36:09,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:09,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:09,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:09,402 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:36:09,404 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:09,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:36:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:36:09,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:10,014 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:10,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 74 [2022-03-01 17:36:10,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:10,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 103 [2022-03-01 17:36:10,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:10,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 81 [2022-03-01 17:36:10,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:36:10,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794131100] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:10,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:10,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:10,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98380636] [2022-03-01 17:36:10,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:10,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:10,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:10,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:10,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:10,268 INFO L87 Difference]: Start difference. First operand 1613 states and 5372 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:10,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:10,763 INFO L93 Difference]: Finished difference Result 1791 states and 5818 transitions. [2022-03-01 17:36:10,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:36:10,764 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:10,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:10,767 INFO L225 Difference]: With dead ends: 1791 [2022-03-01 17:36:10,767 INFO L226 Difference]: Without dead ends: 1703 [2022-03-01 17:36:10,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:36:10,767 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 68 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 162 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:10,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 286 Invalid, 976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 806 Invalid, 0 Unknown, 162 Unchecked, 0.3s Time] [2022-03-01 17:36:10,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2022-03-01 17:36:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1593. [2022-03-01 17:36:10,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.3410804020100504) internal successors, (5319), 1592 states have internal predecessors, (5319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:10,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5319 transitions. [2022-03-01 17:36:10,786 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5319 transitions. Word has length 24 [2022-03-01 17:36:10,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:10,786 INFO L470 AbstractCegarLoop]: Abstraction has 1593 states and 5319 transitions. [2022-03-01 17:36:10,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:10,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5319 transitions. [2022-03-01 17:36:10,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:10,788 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:10,788 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:10,804 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-03-01 17:36:10,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-03-01 17:36:10,989 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:10,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:10,989 INFO L85 PathProgramCache]: Analyzing trace with hash 539717111, now seen corresponding path program 221 times [2022-03-01 17:36:10,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:10,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962766653] [2022-03-01 17:36:10,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:10,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:10,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:11,194 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:11,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962766653] [2022-03-01 17:36:11,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962766653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:11,194 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537116977] [2022-03-01 17:36:11,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:36:11,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:11,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:11,195 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:11,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-03-01 17:36:11,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:36:11,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:11,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:11,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:11,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:11,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:11,475 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:36:11,477 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:11,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:36:11,592 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:11,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:12,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:12,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-01 17:36:12,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:12,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 148 treesize of output 128 [2022-03-01 17:36:12,299 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:12,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 100 [2022-03-01 17:36:12,442 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:12,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537116977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:12,442 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:12,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:12,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502040751] [2022-03-01 17:36:12,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:12,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:12,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:12,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:12,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:12,443 INFO L87 Difference]: Start difference. First operand 1593 states and 5319 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:12,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:12,775 INFO L93 Difference]: Finished difference Result 1705 states and 5613 transitions. [2022-03-01 17:36:12,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:36:12,776 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:12,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:12,779 INFO L225 Difference]: With dead ends: 1705 [2022-03-01 17:36:12,779 INFO L226 Difference]: Without dead ends: 1670 [2022-03-01 17:36:12,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:36:12,779 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 61 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:12,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 212 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 548 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-03-01 17:36:12,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2022-03-01 17:36:12,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1593. [2022-03-01 17:36:12,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.3410804020100504) internal successors, (5319), 1592 states have internal predecessors, (5319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:12,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5319 transitions. [2022-03-01 17:36:12,798 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5319 transitions. Word has length 24 [2022-03-01 17:36:12,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:12,798 INFO L470 AbstractCegarLoop]: Abstraction has 1593 states and 5319 transitions. [2022-03-01 17:36:12,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:12,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5319 transitions. [2022-03-01 17:36:12,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:12,800 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:12,800 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:12,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-03-01 17:36:13,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:13,001 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:13,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:13,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1228727297, now seen corresponding path program 222 times [2022-03-01 17:36:13,001 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:13,001 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074600338] [2022-03-01 17:36:13,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:13,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:13,218 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:13,219 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:13,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074600338] [2022-03-01 17:36:13,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074600338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:13,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910525938] [2022-03-01 17:36:13,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:36:13,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:13,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:13,220 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:13,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-03-01 17:36:13,247 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:36:13,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:13,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:13,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:13,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:13,490 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:13,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:36:13,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:13,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:36:13,571 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:13,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:14,058 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:14,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 73 [2022-03-01 17:36:14,155 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:14,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2022-03-01 17:36:14,161 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:14,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 56 [2022-03-01 17:36:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:14,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910525938] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:14,285 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:14,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:14,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028530598] [2022-03-01 17:36:14,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:14,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:14,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:14,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:14,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:14,286 INFO L87 Difference]: Start difference. First operand 1593 states and 5319 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:14,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:14,833 INFO L93 Difference]: Finished difference Result 1791 states and 5844 transitions. [2022-03-01 17:36:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:36:14,833 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:14,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:14,836 INFO L225 Difference]: With dead ends: 1791 [2022-03-01 17:36:14,836 INFO L226 Difference]: Without dead ends: 1733 [2022-03-01 17:36:14,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:36:14,836 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 78 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:14,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 252 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 690 Invalid, 0 Unknown, 118 Unchecked, 0.3s Time] [2022-03-01 17:36:14,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1733 states. [2022-03-01 17:36:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1733 to 1593. [2022-03-01 17:36:14,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1593 states, 1592 states have (on average 3.3410804020100504) internal successors, (5319), 1592 states have internal predecessors, (5319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:14,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1593 states to 1593 states and 5319 transitions. [2022-03-01 17:36:14,856 INFO L78 Accepts]: Start accepts. Automaton has 1593 states and 5319 transitions. Word has length 24 [2022-03-01 17:36:14,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:14,856 INFO L470 AbstractCegarLoop]: Abstraction has 1593 states and 5319 transitions. [2022-03-01 17:36:14,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:14,856 INFO L276 IsEmpty]: Start isEmpty. Operand 1593 states and 5319 transitions. [2022-03-01 17:36:14,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:14,858 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:14,858 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:14,873 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-03-01 17:36:15,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2022-03-01 17:36:15,058 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:15,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:15,059 INFO L85 PathProgramCache]: Analyzing trace with hash -479321271, now seen corresponding path program 223 times [2022-03-01 17:36:15,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:15,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091156485] [2022-03-01 17:36:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:15,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:15,267 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:15,267 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:15,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091156485] [2022-03-01 17:36:15,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091156485] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:15,267 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013059291] [2022-03-01 17:36:15,268 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:36:15,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:15,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:15,269 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:15,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-03-01 17:36:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:15,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:36:15,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:15,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:15,442 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:36:15,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:15,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-01 17:36:15,548 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:15,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-03-01 17:36:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:15,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:16,020 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:16,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-03-01 17:36:16,253 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:16,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 105 [2022-03-01 17:36:16,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:16,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 83 [2022-03-01 17:36:16,367 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:16,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013059291] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:16,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:16,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:16,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845094149] [2022-03-01 17:36:16,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:16,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:16,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:16,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:16,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:16,368 INFO L87 Difference]: Start difference. First operand 1593 states and 5319 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:16,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:16,826 INFO L93 Difference]: Finished difference Result 1659 states and 5481 transitions. [2022-03-01 17:36:16,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:36:16,826 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:16,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:16,829 INFO L225 Difference]: With dead ends: 1659 [2022-03-01 17:36:16,829 INFO L226 Difference]: Without dead ends: 1620 [2022-03-01 17:36:16,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:36:16,830 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 46 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:16,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 301 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 730 Invalid, 0 Unknown, 221 Unchecked, 0.3s Time] [2022-03-01 17:36:16,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2022-03-01 17:36:16,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1595. [2022-03-01 17:36:16,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.3400250941028857) internal successors, (5324), 1594 states have internal predecessors, (5324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5324 transitions. [2022-03-01 17:36:16,847 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5324 transitions. Word has length 24 [2022-03-01 17:36:16,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:16,847 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5324 transitions. [2022-03-01 17:36:16,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:16,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5324 transitions. [2022-03-01 17:36:16,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:16,849 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:16,849 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:16,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Ended with exit code 0 [2022-03-01 17:36:17,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2022-03-01 17:36:17,050 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:17,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:17,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1577746675, now seen corresponding path program 224 times [2022-03-01 17:36:17,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:17,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222464476] [2022-03-01 17:36:17,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:17,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:17,287 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:17,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222464476] [2022-03-01 17:36:17,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222464476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:17,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038823400] [2022-03-01 17:36:17,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:36:17,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:17,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:17,288 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:17,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-03-01 17:36:17,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:36:17,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:17,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:17,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:17,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:17,459 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:36:17,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:17,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-03-01 17:36:17,514 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:17,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:36:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:17,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:18,006 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:18,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-03-01 17:36:18,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:18,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 147 treesize of output 127 [2022-03-01 17:36:18,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:18,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 99 [2022-03-01 17:36:18,378 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:18,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038823400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:18,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:18,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:18,378 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337127524] [2022-03-01 17:36:18,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:18,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:18,378 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:18,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:18,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:18,379 INFO L87 Difference]: Start difference. First operand 1595 states and 5324 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:18,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:18,900 INFO L93 Difference]: Finished difference Result 1691 states and 5579 transitions. [2022-03-01 17:36:18,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:36:18,900 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:18,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:18,903 INFO L225 Difference]: With dead ends: 1691 [2022-03-01 17:36:18,903 INFO L226 Difference]: Without dead ends: 1656 [2022-03-01 17:36:18,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:36:18,904 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 66 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:18,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 236 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 663 Invalid, 0 Unknown, 148 Unchecked, 0.3s Time] [2022-03-01 17:36:18,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2022-03-01 17:36:18,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1591. [2022-03-01 17:36:18,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1590 states have (on average 3.342138364779874) internal successors, (5314), 1590 states have internal predecessors, (5314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:18,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 5314 transitions. [2022-03-01 17:36:18,923 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 5314 transitions. Word has length 24 [2022-03-01 17:36:18,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:18,923 INFO L470 AbstractCegarLoop]: Abstraction has 1591 states and 5314 transitions. [2022-03-01 17:36:18,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:18,923 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 5314 transitions. [2022-03-01 17:36:18,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:18,925 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:18,925 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:18,941 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-03-01 17:36:19,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:19,125 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:19,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:19,126 INFO L85 PathProgramCache]: Analyzing trace with hash -2095155597, now seen corresponding path program 225 times [2022-03-01 17:36:19,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:19,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349569624] [2022-03-01 17:36:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:19,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:19,319 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:19,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349569624] [2022-03-01 17:36:19,319 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349569624] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:19,319 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017781088] [2022-03-01 17:36:19,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:36:19,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:19,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:19,320 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:19,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-03-01 17:36:19,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:36:19,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:19,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:36:19,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:19,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:19,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:19,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:19,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:36:19,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:19,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:36:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:19,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:20,264 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:20,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 101 [2022-03-01 17:36:20,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:20,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:36:20,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:20,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:36:20,462 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:20,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017781088] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:20,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:20,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:20,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204639753] [2022-03-01 17:36:20,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:20,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:20,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:20,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:20,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:20,463 INFO L87 Difference]: Start difference. First operand 1591 states and 5314 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:20,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:20,832 INFO L93 Difference]: Finished difference Result 1701 states and 5617 transitions. [2022-03-01 17:36:20,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:36:20,833 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:20,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:20,836 INFO L225 Difference]: With dead ends: 1701 [2022-03-01 17:36:20,836 INFO L226 Difference]: Without dead ends: 1642 [2022-03-01 17:36:20,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:36:20,836 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:20,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 221 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 610 Invalid, 0 Unknown, 267 Unchecked, 0.3s Time] [2022-03-01 17:36:20,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2022-03-01 17:36:20,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1595. [2022-03-01 17:36:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.3419071518193224) internal successors, (5327), 1594 states have internal predecessors, (5327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:20,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5327 transitions. [2022-03-01 17:36:20,854 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5327 transitions. Word has length 24 [2022-03-01 17:36:20,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:20,854 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5327 transitions. [2022-03-01 17:36:20,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:20,854 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5327 transitions. [2022-03-01 17:36:20,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:20,856 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:20,856 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:20,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Ended with exit code 0 [2022-03-01 17:36:21,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:21,057 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:21,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:21,057 INFO L85 PathProgramCache]: Analyzing trace with hash -931222423, now seen corresponding path program 226 times [2022-03-01 17:36:21,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:21,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666557418] [2022-03-01 17:36:21,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:21,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:21,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:21,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666557418] [2022-03-01 17:36:21,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666557418] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:21,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703904574] [2022-03-01 17:36:21,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:36:21,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:21,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:21,258 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:21,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-03-01 17:36:21,285 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:36:21,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:21,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:21,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:21,397 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:21,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:21,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:21,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:36:21,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:21,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:36:21,671 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:21,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:22,222 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:22,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:36:22,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:22,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:36:22,460 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:22,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:36:22,481 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:22,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703904574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:22,482 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:22,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:36:22,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358502027] [2022-03-01 17:36:22,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:22,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:36:22,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:22,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:36:22,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:36:22,482 INFO L87 Difference]: Start difference. First operand 1595 states and 5327 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:22,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:22,786 INFO L93 Difference]: Finished difference Result 1689 states and 5593 transitions. [2022-03-01 17:36:22,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:36:22,787 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:22,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:22,789 INFO L225 Difference]: With dead ends: 1689 [2022-03-01 17:36:22,789 INFO L226 Difference]: Without dead ends: 1654 [2022-03-01 17:36:22,789 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:22,790 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 58 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:22,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 204 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 602 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2022-03-01 17:36:22,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2022-03-01 17:36:22,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1595. [2022-03-01 17:36:22,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.3419071518193224) internal successors, (5327), 1594 states have internal predecessors, (5327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:22,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5327 transitions. [2022-03-01 17:36:22,808 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5327 transitions. Word has length 24 [2022-03-01 17:36:22,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:22,808 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5327 transitions. [2022-03-01 17:36:22,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:22,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5327 transitions. [2022-03-01 17:36:22,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:22,810 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:22,810 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:22,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Forceful destruction successful, exit code 0 [2022-03-01 17:36:23,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:23,010 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:23,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:23,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1786604753, now seen corresponding path program 227 times [2022-03-01 17:36:23,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:23,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326446563] [2022-03-01 17:36:23,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:23,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:23,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:23,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:23,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326446563] [2022-03-01 17:36:23,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326446563] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:23,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787038163] [2022-03-01 17:36:23,210 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:36:23,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:23,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:23,211 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:23,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-03-01 17:36:23,238 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:36:23,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:23,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:23,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:23,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:23,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:36:23,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-01 17:36:23,465 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:23,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:23,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:23,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-03-01 17:36:24,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:24,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:36:24,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:24,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:36:24,121 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:24,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787038163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:24,121 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:24,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:24,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907885351] [2022-03-01 17:36:24,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:24,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:24,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:24,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:24,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:24,122 INFO L87 Difference]: Start difference. First operand 1595 states and 5327 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:24,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:24,927 INFO L93 Difference]: Finished difference Result 1940 states and 6307 transitions. [2022-03-01 17:36:24,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:36:24,928 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:24,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:24,931 INFO L225 Difference]: With dead ends: 1940 [2022-03-01 17:36:24,931 INFO L226 Difference]: Without dead ends: 1919 [2022-03-01 17:36:24,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:36:24,931 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 85 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 970 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:24,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 308 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 970 Invalid, 0 Unknown, 8 Unchecked, 0.4s Time] [2022-03-01 17:36:24,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1919 states. [2022-03-01 17:36:24,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1919 to 1628. [2022-03-01 17:36:24,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1628 states, 1627 states have (on average 3.3405039950829747) internal successors, (5435), 1627 states have internal predecessors, (5435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1628 states to 1628 states and 5435 transitions. [2022-03-01 17:36:24,952 INFO L78 Accepts]: Start accepts. Automaton has 1628 states and 5435 transitions. Word has length 24 [2022-03-01 17:36:24,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:24,952 INFO L470 AbstractCegarLoop]: Abstraction has 1628 states and 5435 transitions. [2022-03-01 17:36:24,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:24,952 INFO L276 IsEmpty]: Start isEmpty. Operand 1628 states and 5435 transitions. [2022-03-01 17:36:24,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:24,954 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:24,954 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:24,970 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-03-01 17:36:25,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:25,155 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:25,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:25,155 INFO L85 PathProgramCache]: Analyzing trace with hash 834617287, now seen corresponding path program 228 times [2022-03-01 17:36:25,155 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:25,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071570546] [2022-03-01 17:36:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:25,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:25,389 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:25,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071570546] [2022-03-01 17:36:25,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071570546] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:25,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468646527] [2022-03-01 17:36:25,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:36:25,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:25,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:25,390 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:25,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-03-01 17:36:25,418 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:36:25,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:25,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:25,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:25,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:25,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:36:25,591 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-01 17:36:25,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:25,654 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:26,163 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:26,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 79 treesize of output 70 [2022-03-01 17:36:26,301 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:26,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:36:26,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:26,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:36:26,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:26,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468646527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:26,331 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:26,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:26,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720581278] [2022-03-01 17:36:26,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:26,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:26,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:26,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:26,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:26,332 INFO L87 Difference]: Start difference. First operand 1628 states and 5435 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:27,089 INFO L93 Difference]: Finished difference Result 1946 states and 6316 transitions. [2022-03-01 17:36:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:36:27,089 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:27,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:27,092 INFO L225 Difference]: With dead ends: 1946 [2022-03-01 17:36:27,092 INFO L226 Difference]: Without dead ends: 1925 [2022-03-01 17:36:27,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:36:27,093 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 98 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:27,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 275 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 842 Invalid, 0 Unknown, 8 Unchecked, 0.4s Time] [2022-03-01 17:36:27,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2022-03-01 17:36:27,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1624. [2022-03-01 17:36:27,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1624 states, 1623 states have (on average 3.3425754775107825) internal successors, (5425), 1623 states have internal predecessors, (5425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:27,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 5425 transitions. [2022-03-01 17:36:27,113 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 5425 transitions. Word has length 24 [2022-03-01 17:36:27,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:27,113 INFO L470 AbstractCegarLoop]: Abstraction has 1624 states and 5425 transitions. [2022-03-01 17:36:27,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:27,113 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 5425 transitions. [2022-03-01 17:36:27,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:27,115 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:27,115 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:27,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Forceful destruction successful, exit code 0 [2022-03-01 17:36:27,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:27,316 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:27,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:27,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1740817011, now seen corresponding path program 229 times [2022-03-01 17:36:27,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:27,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212892060] [2022-03-01 17:36:27,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:27,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:27,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:27,520 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:27,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212892060] [2022-03-01 17:36:27,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212892060] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:27,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854894777] [2022-03-01 17:36:27,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:36:27,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:27,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:27,521 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:27,522 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-03-01 17:36:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:27,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:36:27,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:27,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:27,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:27,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:36:27,828 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:27,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:28,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:28,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-03-01 17:36:28,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:28,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:36:28,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:28,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:36:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:28,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854894777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:28,535 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:28,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:28,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891795066] [2022-03-01 17:36:28,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:28,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:28,536 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:28,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:28,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:28,536 INFO L87 Difference]: Start difference. First operand 1624 states and 5425 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:29,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:29,547 INFO L93 Difference]: Finished difference Result 2006 states and 6483 transitions. [2022-03-01 17:36:29,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:36:29,548 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:29,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:29,551 INFO L225 Difference]: With dead ends: 2006 [2022-03-01 17:36:29,551 INFO L226 Difference]: Without dead ends: 1883 [2022-03-01 17:36:29,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:36:29,551 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 110 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:29,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 307 Invalid, 1158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:36:29,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2022-03-01 17:36:29,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1621. [2022-03-01 17:36:29,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1621 states, 1620 states have (on average 3.3407407407407406) internal successors, (5412), 1620 states have internal predecessors, (5412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:29,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1621 states to 1621 states and 5412 transitions. [2022-03-01 17:36:29,572 INFO L78 Accepts]: Start accepts. Automaton has 1621 states and 5412 transitions. Word has length 24 [2022-03-01 17:36:29,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:29,573 INFO L470 AbstractCegarLoop]: Abstraction has 1621 states and 5412 transitions. [2022-03-01 17:36:29,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1621 states and 5412 transitions. [2022-03-01 17:36:29,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:29,575 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:29,575 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:29,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-03-01 17:36:29,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:29,775 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:29,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:29,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2005835981, now seen corresponding path program 230 times [2022-03-01 17:36:29,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:29,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489437301] [2022-03-01 17:36:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:29,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:29,964 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:29,964 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:29,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489437301] [2022-03-01 17:36:29,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489437301] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:29,964 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717964547] [2022-03-01 17:36:29,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:36:29,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:29,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:29,965 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:29,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-03-01 17:36:29,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:36:29,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:29,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:30,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:30,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:30,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2022-03-01 17:36:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:30,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:30,825 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:30,825 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 65 [2022-03-01 17:36:30,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:30,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:36:30,980 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:30,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:36:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:30,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717964547] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:30,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:30,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:30,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102075978] [2022-03-01 17:36:30,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:30,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:30,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:30,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:30,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:30,999 INFO L87 Difference]: Start difference. First operand 1621 states and 5412 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:32,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:32,002 INFO L93 Difference]: Finished difference Result 1977 states and 6392 transitions. [2022-03-01 17:36:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:36:32,002 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:32,005 INFO L225 Difference]: With dead ends: 1977 [2022-03-01 17:36:32,005 INFO L226 Difference]: Without dead ends: 1892 [2022-03-01 17:36:32,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:36:32,006 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 144 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 1109 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:32,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 320 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1109 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:36:32,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2022-03-01 17:36:32,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1611. [2022-03-01 17:36:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1611 states, 1610 states have (on average 3.3434782608695652) internal successors, (5383), 1610 states have internal predecessors, (5383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:32,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1611 states to 1611 states and 5383 transitions. [2022-03-01 17:36:32,025 INFO L78 Accepts]: Start accepts. Automaton has 1611 states and 5383 transitions. Word has length 24 [2022-03-01 17:36:32,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:32,025 INFO L470 AbstractCegarLoop]: Abstraction has 1611 states and 5383 transitions. [2022-03-01 17:36:32,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:32,026 INFO L276 IsEmpty]: Start isEmpty. Operand 1611 states and 5383 transitions. [2022-03-01 17:36:32,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:32,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:32,028 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:32,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Ended with exit code 0 [2022-03-01 17:36:32,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-03-01 17:36:32,228 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:32,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:32,229 INFO L85 PathProgramCache]: Analyzing trace with hash -647549339, now seen corresponding path program 231 times [2022-03-01 17:36:32,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:32,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211587446] [2022-03-01 17:36:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:32,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:32,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:32,452 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:32,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211587446] [2022-03-01 17:36:32,452 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211587446] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:32,452 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605011661] [2022-03-01 17:36:32,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:36:32,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:32,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:32,453 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:32,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-03-01 17:36:32,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:36:32,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:32,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:32,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:32,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:32,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:32,646 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:32,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:36:32,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:32,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:36:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:32,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:33,566 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:33,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-03-01 17:36:33,720 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:33,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:36:33,724 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:33,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:36:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:33,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605011661] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:33,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:33,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:33,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060389909] [2022-03-01 17:36:33,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:33,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:33,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:33,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:33,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=521, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:33,747 INFO L87 Difference]: Start difference. First operand 1611 states and 5383 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:34,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:34,154 INFO L93 Difference]: Finished difference Result 1753 states and 5772 transitions. [2022-03-01 17:36:34,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:36:34,155 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:34,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:34,158 INFO L225 Difference]: With dead ends: 1753 [2022-03-01 17:36:34,158 INFO L226 Difference]: Without dead ends: 1687 [2022-03-01 17:36:34,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:36:34,158 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 74 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:34,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 200 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 594 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2022-03-01 17:36:34,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1687 states. [2022-03-01 17:36:34,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1687 to 1614. [2022-03-01 17:36:34,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1613 states have (on average 3.3434593924364537) internal successors, (5393), 1613 states have internal predecessors, (5393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:34,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 5393 transitions. [2022-03-01 17:36:34,177 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 5393 transitions. Word has length 24 [2022-03-01 17:36:34,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:34,177 INFO L470 AbstractCegarLoop]: Abstraction has 1614 states and 5393 transitions. [2022-03-01 17:36:34,177 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:34,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 5393 transitions. [2022-03-01 17:36:34,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:34,179 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:34,179 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:34,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Ended with exit code 0 [2022-03-01 17:36:34,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-03-01 17:36:34,380 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:34,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:34,380 INFO L85 PathProgramCache]: Analyzing trace with hash 843380829, now seen corresponding path program 232 times [2022-03-01 17:36:34,380 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:34,380 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013257969] [2022-03-01 17:36:34,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:34,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:34,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:34,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:34,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013257969] [2022-03-01 17:36:34,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013257969] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:34,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461055836] [2022-03-01 17:36:34,545 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:36:34,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:34,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:34,547 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:34,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-03-01 17:36:34,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:36:34,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:34,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:36:34,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:34,736 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:34,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:36:34,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:34,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:34,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:34,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-03-01 17:36:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:34,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:35,451 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:35,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-03-01 17:36:35,711 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:35,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:36:35,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:35,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:36:35,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:35,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461055836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:35,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:35,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:36:35,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529656992] [2022-03-01 17:36:35,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:35,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:36:35,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:35,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:36:35,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:36:35,738 INFO L87 Difference]: Start difference. First operand 1614 states and 5393 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:35,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:35,992 INFO L93 Difference]: Finished difference Result 1738 states and 5745 transitions. [2022-03-01 17:36:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:36:35,992 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:35,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:35,995 INFO L225 Difference]: With dead ends: 1738 [2022-03-01 17:36:35,995 INFO L226 Difference]: Without dead ends: 1693 [2022-03-01 17:36:35,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:35,996 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 57 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:35,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 189 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 464 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-03-01 17:36:35,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2022-03-01 17:36:36,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1633. [2022-03-01 17:36:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1632 states have (on average 3.343137254901961) internal successors, (5456), 1632 states have internal predecessors, (5456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:36,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 5456 transitions. [2022-03-01 17:36:36,015 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 5456 transitions. Word has length 24 [2022-03-01 17:36:36,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:36,015 INFO L470 AbstractCegarLoop]: Abstraction has 1633 states and 5456 transitions. [2022-03-01 17:36:36,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:36,015 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 5456 transitions. [2022-03-01 17:36:36,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:36,017 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:36,017 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:36,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-03-01 17:36:36,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2022-03-01 17:36:36,217 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:36,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:36,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1585100867, now seen corresponding path program 233 times [2022-03-01 17:36:36,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:36,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397897020] [2022-03-01 17:36:36,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:36,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:36,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:36,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:36,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397897020] [2022-03-01 17:36:36,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397897020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:36,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933812651] [2022-03-01 17:36:36,406 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:36:36,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:36,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:36,407 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:36,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-03-01 17:36:36,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:36:36,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:36,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:36:36,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:36,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:36,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:36:36,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:36,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:36:36,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:36,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:36:36,839 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:36,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:37,411 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:37,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-03-01 17:36:37,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:37,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:36:37,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:37,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:36:37,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:37,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933812651] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:37,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:37,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:37,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308004909] [2022-03-01 17:36:37,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:37,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:37,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:37,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:37,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:37,636 INFO L87 Difference]: Start difference. First operand 1633 states and 5456 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:38,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:38,273 INFO L93 Difference]: Finished difference Result 2054 states and 6564 transitions. [2022-03-01 17:36:38,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:36:38,273 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:38,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:38,276 INFO L225 Difference]: With dead ends: 2054 [2022-03-01 17:36:38,276 INFO L226 Difference]: Without dead ends: 1889 [2022-03-01 17:36:38,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:36:38,277 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 120 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:38,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 229 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 622 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-03-01 17:36:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1889 states. [2022-03-01 17:36:38,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1889 to 1652. [2022-03-01 17:36:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1652 states, 1651 states have (on average 3.3513022410660205) internal successors, (5533), 1651 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:38,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1652 states to 1652 states and 5533 transitions. [2022-03-01 17:36:38,297 INFO L78 Accepts]: Start accepts. Automaton has 1652 states and 5533 transitions. Word has length 24 [2022-03-01 17:36:38,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:38,297 INFO L470 AbstractCegarLoop]: Abstraction has 1652 states and 5533 transitions. [2022-03-01 17:36:38,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:38,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1652 states and 5533 transitions. [2022-03-01 17:36:38,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:38,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:38,299 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:38,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-03-01 17:36:38,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:38,500 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:38,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:38,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1893993485, now seen corresponding path program 234 times [2022-03-01 17:36:38,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:38,500 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758059128] [2022-03-01 17:36:38,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:38,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:38,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:36:38,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:38,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758059128] [2022-03-01 17:36:38,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758059128] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:38,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390713989] [2022-03-01 17:36:38,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:36:38,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:38,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:38,656 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:38,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-03-01 17:36:38,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:36:38,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:38,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:36:38,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:38,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:36:38,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:36:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:36:38,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:39,387 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:39,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 101 [2022-03-01 17:36:39,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:39,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:36:39,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:39,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:36:39,662 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:36:39,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390713989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:39,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:39,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:36:39,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622508802] [2022-03-01 17:36:39,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:39,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:36:39,663 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:39,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:36:39,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:36:39,663 INFO L87 Difference]: Start difference. First operand 1652 states and 5533 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:40,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:40,311 INFO L93 Difference]: Finished difference Result 1989 states and 6509 transitions. [2022-03-01 17:36:40,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:36:40,311 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:40,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:40,314 INFO L225 Difference]: With dead ends: 1989 [2022-03-01 17:36:40,314 INFO L226 Difference]: Without dead ends: 1867 [2022-03-01 17:36:40,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:36:40,315 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 94 mSDsluCounter, 536 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:40,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 249 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:36:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2022-03-01 17:36:40,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1660. [2022-03-01 17:36:40,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 3.34418324291742) internal successors, (5548), 1659 states have internal predecessors, (5548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 5548 transitions. [2022-03-01 17:36:40,334 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 5548 transitions. Word has length 24 [2022-03-01 17:36:40,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:40,335 INFO L470 AbstractCegarLoop]: Abstraction has 1660 states and 5548 transitions. [2022-03-01 17:36:40,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:40,335 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 5548 transitions. [2022-03-01 17:36:40,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:40,337 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:40,337 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:40,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Ended with exit code 0 [2022-03-01 17:36:40,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-03-01 17:36:40,537 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:40,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:40,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1068770537, now seen corresponding path program 235 times [2022-03-01 17:36:40,538 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:40,538 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828721036] [2022-03-01 17:36:40,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:40,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:40,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:40,694 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:40,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828721036] [2022-03-01 17:36:40,694 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828721036] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:40,694 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104327406] [2022-03-01 17:36:40,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:36:40,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:40,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:40,695 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:40,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-03-01 17:36:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:40,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:36:40,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:40,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:36:40,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:36:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:41,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:41,435 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:41,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-03-01 17:36:41,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:41,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:36:41,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:41,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:36:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:41,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104327406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:41,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:41,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:36:41,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590203828] [2022-03-01 17:36:41,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:41,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:36:41,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:41,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:36:41,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:36:41,720 INFO L87 Difference]: Start difference. First operand 1660 states and 5548 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:42,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:42,798 INFO L93 Difference]: Finished difference Result 2187 states and 7015 transitions. [2022-03-01 17:36:42,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:36:42,798 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:42,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:42,801 INFO L225 Difference]: With dead ends: 2187 [2022-03-01 17:36:42,801 INFO L226 Difference]: Without dead ends: 2034 [2022-03-01 17:36:42,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:36:42,802 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 204 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:42,802 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 295 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1069 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:36:42,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2034 states. [2022-03-01 17:36:42,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2034 to 1660. [2022-03-01 17:36:42,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1660 states, 1659 states have (on average 3.34418324291742) internal successors, (5548), 1659 states have internal predecessors, (5548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:42,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1660 states to 1660 states and 5548 transitions. [2022-03-01 17:36:42,822 INFO L78 Accepts]: Start accepts. Automaton has 1660 states and 5548 transitions. Word has length 24 [2022-03-01 17:36:42,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:42,823 INFO L470 AbstractCegarLoop]: Abstraction has 1660 states and 5548 transitions. [2022-03-01 17:36:42,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:42,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1660 states and 5548 transitions. [2022-03-01 17:36:42,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:42,825 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:42,825 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:42,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Forceful destruction successful, exit code 0 [2022-03-01 17:36:43,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:43,025 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:43,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:43,026 INFO L85 PathProgramCache]: Analyzing trace with hash 487009757, now seen corresponding path program 236 times [2022-03-01 17:36:43,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:43,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956133796] [2022-03-01 17:36:43,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:43,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:43,252 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:43,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956133796] [2022-03-01 17:36:43,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956133796] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:43,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789962496] [2022-03-01 17:36:43,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:36:43,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:43,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:43,254 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:43,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-03-01 17:36:43,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:36:43,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:43,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:43,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:43,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:43,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:43,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:36:43,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:43,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:36:43,677 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:43,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:44,351 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:44,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-03-01 17:36:44,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:44,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:36:44,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:44,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:36:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:44,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789962496] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:44,549 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:44,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:44,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105809872] [2022-03-01 17:36:44,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:44,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:44,550 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:44,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:44,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:44,550 INFO L87 Difference]: Start difference. First operand 1660 states and 5548 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:46,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:46,344 INFO L93 Difference]: Finished difference Result 2187 states and 6993 transitions. [2022-03-01 17:36:46,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:36:46,344 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:46,349 INFO L225 Difference]: With dead ends: 2187 [2022-03-01 17:36:46,349 INFO L226 Difference]: Without dead ends: 2044 [2022-03-01 17:36:46,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=252, Invalid=1230, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:36:46,350 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 194 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:46,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 271 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 782 Invalid, 0 Unknown, 120 Unchecked, 0.4s Time] [2022-03-01 17:36:46,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2044 states. [2022-03-01 17:36:46,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2044 to 1669. [2022-03-01 17:36:46,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.3513189448441247) internal successors, (5590), 1668 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:46,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5590 transitions. [2022-03-01 17:36:46,377 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5590 transitions. Word has length 24 [2022-03-01 17:36:46,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:46,377 INFO L470 AbstractCegarLoop]: Abstraction has 1669 states and 5590 transitions. [2022-03-01 17:36:46,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:46,377 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5590 transitions. [2022-03-01 17:36:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:46,380 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:46,380 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:46,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Ended with exit code 0 [2022-03-01 17:36:46,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:46,601 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:46,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:46,602 INFO L85 PathProgramCache]: Analyzing trace with hash 371489043, now seen corresponding path program 237 times [2022-03-01 17:36:46,602 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:46,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537913684] [2022-03-01 17:36:46,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:46,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:46,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:46,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537913684] [2022-03-01 17:36:46,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537913684] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:46,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549519237] [2022-03-01 17:36:46,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:36:46,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:46,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:46,828 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:46,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-03-01 17:36:46,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:36:46,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:46,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:46,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:46,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:47,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:47,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:36:47,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:47,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:36:47,145 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:47,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:47,730 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:47,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 74 [2022-03-01 17:36:47,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:47,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:36:47,902 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:47,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:36:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:47,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549519237] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:47,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:47,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:47,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833794281] [2022-03-01 17:36:47,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:47,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:47,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:47,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:47,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:47,925 INFO L87 Difference]: Start difference. First operand 1669 states and 5590 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:48,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:48,823 INFO L93 Difference]: Finished difference Result 1969 states and 6470 transitions. [2022-03-01 17:36:48,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:36:48,823 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:48,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:48,828 INFO L225 Difference]: With dead ends: 1969 [2022-03-01 17:36:48,828 INFO L226 Difference]: Without dead ends: 1884 [2022-03-01 17:36:48,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=977, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:36:48,829 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 127 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:48,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 247 Invalid, 905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 822 Invalid, 0 Unknown, 60 Unchecked, 0.4s Time] [2022-03-01 17:36:48,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2022-03-01 17:36:48,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1676. [2022-03-01 17:36:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.3540298507462687) internal successors, (5618), 1675 states have internal predecessors, (5618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5618 transitions. [2022-03-01 17:36:48,852 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5618 transitions. Word has length 24 [2022-03-01 17:36:48,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:48,852 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5618 transitions. [2022-03-01 17:36:48,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:48,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5618 transitions. [2022-03-01 17:36:48,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:48,855 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:48,855 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:48,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Ended with exit code 0 [2022-03-01 17:36:49,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:49,071 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:49,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:49,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1177075131, now seen corresponding path program 238 times [2022-03-01 17:36:49,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:49,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016722386] [2022-03-01 17:36:49,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:49,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:49,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:49,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:49,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:49,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016722386] [2022-03-01 17:36:49,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016722386] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:49,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363741092] [2022-03-01 17:36:49,265 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:36:49,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:49,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:49,266 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:49,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-03-01 17:36:49,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:36:49,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:49,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:49,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:49,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:49,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:49,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:36:49,662 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:49,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:36:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:49,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:50,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:50,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:36:50,552 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:50,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:36:50,556 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:50,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:36:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:50,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363741092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:50,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:50,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:50,578 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086027115] [2022-03-01 17:36:50,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:50,578 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:50,578 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:50,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:50,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:50,578 INFO L87 Difference]: Start difference. First operand 1676 states and 5618 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:51,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:51,191 INFO L93 Difference]: Finished difference Result 2034 states and 6609 transitions. [2022-03-01 17:36:51,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:36:51,192 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:51,196 INFO L225 Difference]: With dead ends: 2034 [2022-03-01 17:36:51,196 INFO L226 Difference]: Without dead ends: 1976 [2022-03-01 17:36:51,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:36:51,196 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 119 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 829 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 1122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:51,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 297 Invalid, 1122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 829 Invalid, 0 Unknown, 274 Unchecked, 0.4s Time] [2022-03-01 17:36:51,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1976 states. [2022-03-01 17:36:51,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1976 to 1669. [2022-03-01 17:36:51,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.3513189448441247) internal successors, (5590), 1668 states have internal predecessors, (5590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:51,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5590 transitions. [2022-03-01 17:36:51,216 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5590 transitions. Word has length 24 [2022-03-01 17:36:51,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:51,216 INFO L470 AbstractCegarLoop]: Abstraction has 1669 states and 5590 transitions. [2022-03-01 17:36:51,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:51,216 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5590 transitions. [2022-03-01 17:36:51,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:51,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:51,218 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:51,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-03-01 17:36:51,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:51,419 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:51,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:51,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1661477901, now seen corresponding path program 239 times [2022-03-01 17:36:51,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:51,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338494739] [2022-03-01 17:36:51,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:51,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:51,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:51,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338494739] [2022-03-01 17:36:51,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338494739] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:51,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531205044] [2022-03-01 17:36:51,562 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:36:51,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:51,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:51,564 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:51,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-03-01 17:36:51,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:36:51,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:51,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:51,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:51,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:51,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:36:51,855 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:51,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:52,352 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:52,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:36:52,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:52,518 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:36:52,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:52,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:36:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:52,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531205044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:52,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:52,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:52,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56564843] [2022-03-01 17:36:52,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:52,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:52,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:52,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:52,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:52,542 INFO L87 Difference]: Start difference. First operand 1669 states and 5590 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:53,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:53,551 INFO L93 Difference]: Finished difference Result 2127 states and 6866 transitions. [2022-03-01 17:36:53,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:36:53,551 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:53,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:53,555 INFO L225 Difference]: With dead ends: 2127 [2022-03-01 17:36:53,556 INFO L226 Difference]: Without dead ends: 2026 [2022-03-01 17:36:53,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=163, Invalid=893, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:36:53,556 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 114 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 1098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:53,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 277 Invalid, 1098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1062 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:36:53,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2022-03-01 17:36:53,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1681. [2022-03-01 17:36:53,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1681 states, 1680 states have (on average 3.348809523809524) internal successors, (5626), 1680 states have internal predecessors, (5626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1681 states to 1681 states and 5626 transitions. [2022-03-01 17:36:53,578 INFO L78 Accepts]: Start accepts. Automaton has 1681 states and 5626 transitions. Word has length 24 [2022-03-01 17:36:53,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:53,578 INFO L470 AbstractCegarLoop]: Abstraction has 1681 states and 5626 transitions. [2022-03-01 17:36:53,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:53,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1681 states and 5626 transitions. [2022-03-01 17:36:53,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:53,581 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:53,581 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:53,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-03-01 17:36:53,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:53,784 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:53,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:53,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1120487053, now seen corresponding path program 240 times [2022-03-01 17:36:53,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:53,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936878016] [2022-03-01 17:36:53,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:53,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:36:53,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:53,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936878016] [2022-03-01 17:36:53,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936878016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:53,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703798271] [2022-03-01 17:36:53,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:36:53,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:53,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:53,975 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:53,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-03-01 17:36:54,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:36:54,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:54,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:36:54,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:54,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:54,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:54,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:36:54,330 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:54,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:36:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:36:54,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:54,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:54,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 97 [2022-03-01 17:36:55,042 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:55,042 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:36:55,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:55,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:36:55,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:36:55,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703798271] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:55,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:55,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:36:55,075 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479163345] [2022-03-01 17:36:55,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:55,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:36:55,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:55,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:36:55,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:36:55,076 INFO L87 Difference]: Start difference. First operand 1681 states and 5626 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:55,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:55,541 INFO L93 Difference]: Finished difference Result 1959 states and 6383 transitions. [2022-03-01 17:36:55,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:36:55,542 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:55,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:55,548 INFO L225 Difference]: With dead ends: 1959 [2022-03-01 17:36:55,548 INFO L226 Difference]: Without dead ends: 1897 [2022-03-01 17:36:55,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:36:55,549 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 68 mSDsluCounter, 576 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:55,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 305 Invalid, 946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 812 Invalid, 0 Unknown, 123 Unchecked, 0.3s Time] [2022-03-01 17:36:55,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1897 states. [2022-03-01 17:36:55,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1897 to 1691. [2022-03-01 17:36:55,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 3.341420118343195) internal successors, (5647), 1690 states have internal predecessors, (5647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:55,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 5647 transitions. [2022-03-01 17:36:55,573 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 5647 transitions. Word has length 24 [2022-03-01 17:36:55,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:55,573 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 5647 transitions. [2022-03-01 17:36:55,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:55,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 5647 transitions. [2022-03-01 17:36:55,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:55,575 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:55,575 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:55,592 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-03-01 17:36:55,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-03-01 17:36:55,778 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:55,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:55,778 INFO L85 PathProgramCache]: Analyzing trace with hash -2000926113, now seen corresponding path program 241 times [2022-03-01 17:36:55,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:55,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022057035] [2022-03-01 17:36:55,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:55,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:55,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:56,003 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:56,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:56,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022057035] [2022-03-01 17:36:56,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022057035] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:56,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675306790] [2022-03-01 17:36:56,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:36:56,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:56,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:56,005 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:56,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-03-01 17:36:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:56,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:56,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:56,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:56,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:36:56,739 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:56,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:36:56,742 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:56,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:36:56,798 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:56,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:57,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:57,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:36:57,487 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:57,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:36:57,491 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:57,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:36:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:57,519 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675306790] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:57,519 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:57,519 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:36:57,519 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414311168] [2022-03-01 17:36:57,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:57,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:36:57,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:57,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:36:57,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:36:57,520 INFO L87 Difference]: Start difference. First operand 1691 states and 5647 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:57,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:57,748 INFO L93 Difference]: Finished difference Result 1765 states and 5850 transitions. [2022-03-01 17:36:57,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:36:57,749 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:57,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:57,753 INFO L225 Difference]: With dead ends: 1765 [2022-03-01 17:36:57,753 INFO L226 Difference]: Without dead ends: 1750 [2022-03-01 17:36:57,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:36:57,753 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 54 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 361 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:57,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 238 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 523 Invalid, 0 Unknown, 361 Unchecked, 0.2s Time] [2022-03-01 17:36:57,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2022-03-01 17:36:57,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1691. [2022-03-01 17:36:57,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1691 states, 1690 states have (on average 3.341420118343195) internal successors, (5647), 1690 states have internal predecessors, (5647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:57,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1691 states to 1691 states and 5647 transitions. [2022-03-01 17:36:57,773 INFO L78 Accepts]: Start accepts. Automaton has 1691 states and 5647 transitions. Word has length 24 [2022-03-01 17:36:57,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:57,773 INFO L470 AbstractCegarLoop]: Abstraction has 1691 states and 5647 transitions. [2022-03-01 17:36:57,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:57,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1691 states and 5647 transitions. [2022-03-01 17:36:57,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:57,775 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:57,775 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:57,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Ended with exit code 0 [2022-03-01 17:36:57,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2022-03-01 17:36:57,976 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:57,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:57,976 INFO L85 PathProgramCache]: Analyzing trace with hash 116185995, now seen corresponding path program 242 times [2022-03-01 17:36:57,976 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:57,976 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413589177] [2022-03-01 17:36:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:57,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:58,093 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:58,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:58,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413589177] [2022-03-01 17:36:58,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413589177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:58,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040131] [2022-03-01 17:36:58,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:36:58,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:58,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:58,095 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:58,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-03-01 17:36:58,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:36:58,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:58,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:58,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:58,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-03-01 17:36:58,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:36:58,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-01 17:36:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:58,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:58,843 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:58,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 74 [2022-03-01 17:36:58,973 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:58,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 28 [2022-03-01 17:36:58,977 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:36:58,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 24 [2022-03-01 17:36:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:58,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:58,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:58,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:36:58,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978143600] [2022-03-01 17:36:58,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:58,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:36:58,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:58,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:36:58,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:36:58,995 INFO L87 Difference]: Start difference. First operand 1691 states and 5647 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:59,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:59,240 INFO L93 Difference]: Finished difference Result 1941 states and 6384 transitions. [2022-03-01 17:36:59,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:36:59,240 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:36:59,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:59,244 INFO L225 Difference]: With dead ends: 1941 [2022-03-01 17:36:59,244 INFO L226 Difference]: Without dead ends: 1910 [2022-03-01 17:36:59,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:36:59,244 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:59,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 176 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 585 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-03-01 17:36:59,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2022-03-01 17:36:59,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1699. [2022-03-01 17:36:59,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1699 states, 1698 states have (on average 3.3380447585394584) internal successors, (5668), 1698 states have internal predecessors, (5668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:59,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1699 states to 1699 states and 5668 transitions. [2022-03-01 17:36:59,275 INFO L78 Accepts]: Start accepts. Automaton has 1699 states and 5668 transitions. Word has length 24 [2022-03-01 17:36:59,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:59,275 INFO L470 AbstractCegarLoop]: Abstraction has 1699 states and 5668 transitions. [2022-03-01 17:36:59,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:59,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1699 states and 5668 transitions. [2022-03-01 17:36:59,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:36:59,278 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:59,278 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:59,304 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-03-01 17:36:59,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-03-01 17:36:59,491 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:36:59,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:59,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1982671595, now seen corresponding path program 243 times [2022-03-01 17:36:59,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:59,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176458648] [2022-03-01 17:36:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:59,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:59,669 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:59,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176458648] [2022-03-01 17:36:59,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176458648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:59,669 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814933970] [2022-03-01 17:36:59,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:36:59,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:59,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:59,670 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:59,670 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-03-01 17:36:59,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:36:59,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:59,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:59,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:59,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:36:59,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:36:59,983 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:36:59,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:00,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:00,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2022-03-01 17:37:00,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:00,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:37:00,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:00,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:37:00,652 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:00,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814933970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:00,652 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:00,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:37:00,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920614009] [2022-03-01 17:37:00,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:00,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:37:00,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:00,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:37:00,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:37:00,653 INFO L87 Difference]: Start difference. First operand 1699 states and 5668 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:01,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:01,280 INFO L93 Difference]: Finished difference Result 2169 states and 6976 transitions. [2022-03-01 17:37:01,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:37:01,281 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:01,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:01,285 INFO L225 Difference]: With dead ends: 2169 [2022-03-01 17:37:01,286 INFO L226 Difference]: Without dead ends: 2050 [2022-03-01 17:37:01,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:37:01,286 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 144 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 90 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:01,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 278 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 868 Invalid, 0 Unknown, 90 Unchecked, 0.4s Time] [2022-03-01 17:37:01,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2050 states. [2022-03-01 17:37:01,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2050 to 1721. [2022-03-01 17:37:01,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1721 states, 1720 states have (on average 3.338953488372093) internal successors, (5743), 1720 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:01,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1721 states to 1721 states and 5743 transitions. [2022-03-01 17:37:01,322 INFO L78 Accepts]: Start accepts. Automaton has 1721 states and 5743 transitions. Word has length 24 [2022-03-01 17:37:01,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:01,322 INFO L470 AbstractCegarLoop]: Abstraction has 1721 states and 5743 transitions. [2022-03-01 17:37:01,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:01,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1721 states and 5743 transitions. [2022-03-01 17:37:01,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:01,325 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:01,325 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:01,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Forceful destruction successful, exit code 0 [2022-03-01 17:37:01,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:01,545 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:01,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:01,545 INFO L85 PathProgramCache]: Analyzing trace with hash -559489929, now seen corresponding path program 244 times [2022-03-01 17:37:01,545 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:01,545 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260680986] [2022-03-01 17:37:01,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:01,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:01,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:01,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260680986] [2022-03-01 17:37:01,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260680986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:01,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932653556] [2022-03-01 17:37:01,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:37:01,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:01,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:01,750 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:01,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-03-01 17:37:01,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:37:01,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:01,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:37:01,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:01,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:37:01,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:37:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:02,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:02,576 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:02,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 98 [2022-03-01 17:37:02,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:02,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:37:02,753 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:02,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:37:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:02,775 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932653556] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:02,775 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:02,775 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:37:02,775 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529165478] [2022-03-01 17:37:02,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:02,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:37:02,776 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:02,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:37:02,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:37:02,776 INFO L87 Difference]: Start difference. First operand 1721 states and 5743 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:03,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:03,783 INFO L93 Difference]: Finished difference Result 2422 states and 7694 transitions. [2022-03-01 17:37:03,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:37:03,783 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:03,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:03,787 INFO L225 Difference]: With dead ends: 2422 [2022-03-01 17:37:03,787 INFO L226 Difference]: Without dead ends: 2240 [2022-03-01 17:37:03,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=149, Invalid=781, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:37:03,787 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 203 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:03,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 343 Invalid, 1258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:37:03,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2022-03-01 17:37:03,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 1701. [2022-03-01 17:37:03,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1701 states, 1700 states have (on average 3.333529411764706) internal successors, (5667), 1700 states have internal predecessors, (5667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1701 states to 1701 states and 5667 transitions. [2022-03-01 17:37:03,810 INFO L78 Accepts]: Start accepts. Automaton has 1701 states and 5667 transitions. Word has length 24 [2022-03-01 17:37:03,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:03,811 INFO L470 AbstractCegarLoop]: Abstraction has 1701 states and 5667 transitions. [2022-03-01 17:37:03,811 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:03,811 INFO L276 IsEmpty]: Start isEmpty. Operand 1701 states and 5667 transitions. [2022-03-01 17:37:03,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:03,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:03,813 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:03,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-03-01 17:37:04,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-03-01 17:37:04,013 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:04,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:04,014 INFO L85 PathProgramCache]: Analyzing trace with hash 291174387, now seen corresponding path program 245 times [2022-03-01 17:37:04,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:04,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726858196] [2022-03-01 17:37:04,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:04,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:04,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:04,190 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:04,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726858196] [2022-03-01 17:37:04,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726858196] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:04,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452764299] [2022-03-01 17:37:04,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:37:04,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:04,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:04,192 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:04,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-03-01 17:37:04,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:37:04,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:04,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:37:04,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:04,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:37:04,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:37:04,451 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:04,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:04,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:04,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2022-03-01 17:37:04,928 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:04,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:37:04,932 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:04,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:37:04,954 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:04,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452764299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:04,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:04,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:37:04,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717089973] [2022-03-01 17:37:04,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:04,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:37:04,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:04,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:37:04,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:37:04,955 INFO L87 Difference]: Start difference. First operand 1701 states and 5667 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:05,582 INFO L93 Difference]: Finished difference Result 2203 states and 7254 transitions. [2022-03-01 17:37:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:37:05,583 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:05,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:05,586 INFO L225 Difference]: With dead ends: 2203 [2022-03-01 17:37:05,587 INFO L226 Difference]: Without dead ends: 2157 [2022-03-01 17:37:05,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:37:05,587 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 148 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:05,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 247 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:37:05,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2022-03-01 17:37:05,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 1714. [2022-03-01 17:37:05,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 3.338587273788675) internal successors, (5719), 1713 states have internal predecessors, (5719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:05,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 5719 transitions. [2022-03-01 17:37:05,609 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 5719 transitions. Word has length 24 [2022-03-01 17:37:05,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:05,609 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 5719 transitions. [2022-03-01 17:37:05,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:05,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 5719 transitions. [2022-03-01 17:37:05,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:05,612 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:05,612 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:05,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-03-01 17:37:05,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2022-03-01 17:37:05,812 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:05,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:05,812 INFO L85 PathProgramCache]: Analyzing trace with hash 892806561, now seen corresponding path program 246 times [2022-03-01 17:37:05,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:05,813 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484477905] [2022-03-01 17:37:05,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:05,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:06,053 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:06,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:06,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484477905] [2022-03-01 17:37:06,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484477905] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:06,053 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158304023] [2022-03-01 17:37:06,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:37:06,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:06,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:06,054 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:06,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-03-01 17:37:06,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:37:06,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:06,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:37:06,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:06,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:06,274 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:06,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:37:06,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:06,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:37:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:06,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:07,252 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:07,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-01 17:37:07,349 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:07,350 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:37:07,354 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:07,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:37:07,378 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:07,378 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158304023] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:07,378 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:07,378 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:37:07,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607240829] [2022-03-01 17:37:07,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:07,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:37:07,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:07,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:37:07,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:37:07,379 INFO L87 Difference]: Start difference. First operand 1714 states and 5719 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:08,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:08,243 INFO L93 Difference]: Finished difference Result 2158 states and 7134 transitions. [2022-03-01 17:37:08,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:37:08,244 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:08,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:08,247 INFO L225 Difference]: With dead ends: 2158 [2022-03-01 17:37:08,247 INFO L226 Difference]: Without dead ends: 2092 [2022-03-01 17:37:08,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=157, Invalid=835, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:37:08,248 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 108 mSDsluCounter, 370 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:08,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 214 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 507 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2022-03-01 17:37:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2022-03-01 17:37:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1716. [2022-03-01 17:37:08,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1716 states, 1715 states have (on average 3.33935860058309) internal successors, (5727), 1715 states have internal predecessors, (5727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:08,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1716 states to 1716 states and 5727 transitions. [2022-03-01 17:37:08,269 INFO L78 Accepts]: Start accepts. Automaton has 1716 states and 5727 transitions. Word has length 24 [2022-03-01 17:37:08,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:08,270 INFO L470 AbstractCegarLoop]: Abstraction has 1716 states and 5727 transitions. [2022-03-01 17:37:08,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:08,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1716 states and 5727 transitions. [2022-03-01 17:37:08,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:08,272 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:08,272 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:08,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-03-01 17:37:08,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:08,472 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:08,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:08,473 INFO L85 PathProgramCache]: Analyzing trace with hash 777285847, now seen corresponding path program 247 times [2022-03-01 17:37:08,473 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:08,473 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312742106] [2022-03-01 17:37:08,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:08,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:08,723 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:08,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:08,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312742106] [2022-03-01 17:37:08,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312742106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:08,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578455238] [2022-03-01 17:37:08,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:37:08,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:08,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:08,725 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:08,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-03-01 17:37:08,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:08,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:37:08,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:08,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:09,005 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:09,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:37:09,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:09,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:37:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:09,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:09,857 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:09,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-03-01 17:37:10,033 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:10,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:37:10,037 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:10,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:37:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:10,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578455238] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:10,067 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:10,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:37:10,067 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926276452] [2022-03-01 17:37:10,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:10,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:37:10,067 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:10,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:37:10,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:37:10,068 INFO L87 Difference]: Start difference. First operand 1716 states and 5727 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:11,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:11,408 INFO L93 Difference]: Finished difference Result 2468 states and 7965 transitions. [2022-03-01 17:37:11,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:37:11,409 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:11,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:11,413 INFO L225 Difference]: With dead ends: 2468 [2022-03-01 17:37:11,413 INFO L226 Difference]: Without dead ends: 2315 [2022-03-01 17:37:11,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:37:11,413 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 272 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 166 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:11,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 268 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 719 Invalid, 0 Unknown, 166 Unchecked, 0.4s Time] [2022-03-01 17:37:11,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-03-01 17:37:11,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 1720. [2022-03-01 17:37:11,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1720 states, 1719 states have (on average 3.340895869691681) internal successors, (5743), 1719 states have internal predecessors, (5743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1720 states to 1720 states and 5743 transitions. [2022-03-01 17:37:11,439 INFO L78 Accepts]: Start accepts. Automaton has 1720 states and 5743 transitions. Word has length 24 [2022-03-01 17:37:11,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:11,439 INFO L470 AbstractCegarLoop]: Abstraction has 1720 states and 5743 transitions. [2022-03-01 17:37:11,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1720 states and 5743 transitions. [2022-03-01 17:37:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:11,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:11,441 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:11,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Forceful destruction successful, exit code 0 [2022-03-01 17:37:11,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:11,642 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:11,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:11,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1443043937, now seen corresponding path program 248 times [2022-03-01 17:37:11,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:11,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361884581] [2022-03-01 17:37:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:11,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:11,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:37:11,857 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:11,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361884581] [2022-03-01 17:37:11,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361884581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:11,857 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692850897] [2022-03-01 17:37:11,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:37:11,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:11,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:11,859 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:11,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-03-01 17:37:11,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:37:11,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:11,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:37:11,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:11,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:11,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:12,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:12,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:37:12,342 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:12,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:37:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:37:12,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:13,289 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:13,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-01 17:37:13,388 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:13,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:37:13,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:13,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:37:13,420 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:37:13,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692850897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:13,420 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:13,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:37:13,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064330030] [2022-03-01 17:37:13,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:13,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:37:13,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:13,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:37:13,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:37:13,421 INFO L87 Difference]: Start difference. First operand 1720 states and 5743 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:13,634 INFO L93 Difference]: Finished difference Result 1826 states and 6052 transitions. [2022-03-01 17:37:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:37:13,634 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:13,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:13,637 INFO L225 Difference]: With dead ends: 1826 [2022-03-01 17:37:13,637 INFO L226 Difference]: Without dead ends: 1799 [2022-03-01 17:37:13,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:37:13,638 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:13,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 213 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 415 Invalid, 0 Unknown, 165 Unchecked, 0.2s Time] [2022-03-01 17:37:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1799 states. [2022-03-01 17:37:13,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1799 to 1727. [2022-03-01 17:37:13,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1727 states, 1726 states have (on average 3.3435689455388182) internal successors, (5771), 1726 states have internal predecessors, (5771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:13,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1727 states to 1727 states and 5771 transitions. [2022-03-01 17:37:13,669 INFO L78 Accepts]: Start accepts. Automaton has 1727 states and 5771 transitions. Word has length 24 [2022-03-01 17:37:13,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:13,669 INFO L470 AbstractCegarLoop]: Abstraction has 1727 states and 5771 transitions. [2022-03-01 17:37:13,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:13,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1727 states and 5771 transitions. [2022-03-01 17:37:13,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:13,671 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:13,671 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:13,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-03-01 17:37:13,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:13,872 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:13,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:13,872 INFO L85 PathProgramCache]: Analyzing trace with hash -771278327, now seen corresponding path program 249 times [2022-03-01 17:37:13,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:13,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966026899] [2022-03-01 17:37:13,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:13,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:14,073 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:14,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966026899] [2022-03-01 17:37:14,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966026899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:14,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818521168] [2022-03-01 17:37:14,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:37:14,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:14,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:14,074 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:14,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-03-01 17:37:14,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:37:14,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:14,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:37:14,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:14,169 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:14,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:14,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:14,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:37:14,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:14,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:37:14,856 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:14,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:15,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:15,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-01 17:37:15,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:15,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:37:15,707 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:15,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:37:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:15,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818521168] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:15,733 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:15,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:37:15,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058236667] [2022-03-01 17:37:15,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:15,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:37:15,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:15,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:37:15,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:37:15,734 INFO L87 Difference]: Start difference. First operand 1727 states and 5771 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:15,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:15,930 INFO L93 Difference]: Finished difference Result 1861 states and 6165 transitions. [2022-03-01 17:37:15,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:37:15,930 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:15,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:15,933 INFO L225 Difference]: With dead ends: 1861 [2022-03-01 17:37:15,933 INFO L226 Difference]: Without dead ends: 1830 [2022-03-01 17:37:15,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:37:15,934 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 48 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:15,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 245 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 460 Invalid, 0 Unknown, 278 Unchecked, 0.2s Time] [2022-03-01 17:37:15,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2022-03-01 17:37:15,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1743. [2022-03-01 17:37:15,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1743 states, 1742 states have (on average 3.341561423650976) internal successors, (5821), 1742 states have internal predecessors, (5821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:15,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 5821 transitions. [2022-03-01 17:37:15,953 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 5821 transitions. Word has length 24 [2022-03-01 17:37:15,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:15,953 INFO L470 AbstractCegarLoop]: Abstraction has 1743 states and 5821 transitions. [2022-03-01 17:37:15,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:15,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 5821 transitions. [2022-03-01 17:37:15,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:15,955 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:15,955 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:15,971 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-03-01 17:37:16,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:16,156 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:16,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:16,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1446660255, now seen corresponding path program 250 times [2022-03-01 17:37:16,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:16,156 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161738214] [2022-03-01 17:37:16,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:16,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:16,357 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:16,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161738214] [2022-03-01 17:37:16,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161738214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:16,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979538659] [2022-03-01 17:37:16,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:37:16,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:16,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:16,358 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:16,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-03-01 17:37:16,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:37:16,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:16,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:37:16,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:16,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:16,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:17,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:17,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:37:17,130 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:17,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 8 [2022-03-01 17:37:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:17,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:17,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:17,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-03-01 17:37:17,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:17,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:37:17,957 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:17,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:37:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:17,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [979538659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:17,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:17,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:37:17,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852748904] [2022-03-01 17:37:17,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:17,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:37:17,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:17,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:37:17,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:37:17,980 INFO L87 Difference]: Start difference. First operand 1743 states and 5821 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:18,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:18,263 INFO L93 Difference]: Finished difference Result 1852 states and 6131 transitions. [2022-03-01 17:37:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:37:18,264 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:18,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:18,267 INFO L225 Difference]: With dead ends: 1852 [2022-03-01 17:37:18,267 INFO L226 Difference]: Without dead ends: 1830 [2022-03-01 17:37:18,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:37:18,267 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 60 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:18,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 228 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 534 Invalid, 0 Unknown, 154 Unchecked, 0.2s Time] [2022-03-01 17:37:18,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1830 states. [2022-03-01 17:37:18,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1830 to 1763. [2022-03-01 17:37:18,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1762 states have (on average 3.333144154370034) internal successors, (5873), 1762 states have internal predecessors, (5873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:18,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 5873 transitions. [2022-03-01 17:37:18,297 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 5873 transitions. Word has length 24 [2022-03-01 17:37:18,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:18,297 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 5873 transitions. [2022-03-01 17:37:18,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:18,297 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 5873 transitions. [2022-03-01 17:37:18,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:18,299 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:18,299 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:18,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Forceful destruction successful, exit code 0 [2022-03-01 17:37:18,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2022-03-01 17:37:18,500 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:18,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:18,501 INFO L85 PathProgramCache]: Analyzing trace with hash -238674301, now seen corresponding path program 251 times [2022-03-01 17:37:18,501 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:18,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813033817] [2022-03-01 17:37:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:18,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:18,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:18,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:18,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813033817] [2022-03-01 17:37:18,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813033817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:18,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844953351] [2022-03-01 17:37:18,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:37:18,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:18,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:18,703 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:18,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-03-01 17:37:18,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:37:18,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:18,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:37:18,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:18,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:19,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:19,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:37:19,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:19,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:37:19,082 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:19,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:19,656 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:19,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 48 [2022-03-01 17:37:19,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:19,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:37:19,719 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:19,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:37:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:19,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844953351] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:19,740 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:19,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:37:19,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974569298] [2022-03-01 17:37:19,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:19,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:37:19,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:19,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:37:19,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:37:19,741 INFO L87 Difference]: Start difference. First operand 1763 states and 5873 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:21,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:21,278 INFO L93 Difference]: Finished difference Result 2399 states and 7757 transitions. [2022-03-01 17:37:21,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:37:21,278 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:21,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:21,282 INFO L225 Difference]: With dead ends: 2399 [2022-03-01 17:37:21,282 INFO L226 Difference]: Without dead ends: 2345 [2022-03-01 17:37:21,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=205, Invalid=1277, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:37:21,283 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 150 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 438 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:21,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 389 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 916 Invalid, 0 Unknown, 438 Unchecked, 0.4s Time] [2022-03-01 17:37:21,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2345 states. [2022-03-01 17:37:21,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2345 to 1740. [2022-03-01 17:37:21,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1739 states have (on average 3.3329499712478436) internal successors, (5796), 1739 states have internal predecessors, (5796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:21,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 5796 transitions. [2022-03-01 17:37:21,306 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 5796 transitions. Word has length 24 [2022-03-01 17:37:21,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:21,307 INFO L470 AbstractCegarLoop]: Abstraction has 1740 states and 5796 transitions. [2022-03-01 17:37:21,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:21,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 5796 transitions. [2022-03-01 17:37:21,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:21,309 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:21,309 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:21,324 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-03-01 17:37:21,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-03-01 17:37:21,509 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:21,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:21,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1255681097, now seen corresponding path program 252 times [2022-03-01 17:37:21,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:21,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626321647] [2022-03-01 17:37:21,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:21,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:21,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:21,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626321647] [2022-03-01 17:37:21,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626321647] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:21,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411088242] [2022-03-01 17:37:21,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:37:21,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:21,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:21,714 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:21,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-03-01 17:37:21,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:37:21,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:21,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:37:21,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:21,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:22,045 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:22,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 41 [2022-03-01 17:37:22,048 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:22,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 35 [2022-03-01 17:37:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:22,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:22,778 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:22,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-01 17:37:22,917 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:22,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:37:22,922 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:22,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:37:22,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:22,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411088242] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:22,951 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:22,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:37:22,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779359946] [2022-03-01 17:37:22,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:22,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:37:22,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:22,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:37:22,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:37:22,952 INFO L87 Difference]: Start difference. First operand 1740 states and 5796 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:23,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:23,780 INFO L93 Difference]: Finished difference Result 2203 states and 7184 transitions. [2022-03-01 17:37:23,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:37:23,781 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:23,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:23,785 INFO L225 Difference]: With dead ends: 2203 [2022-03-01 17:37:23,785 INFO L226 Difference]: Without dead ends: 2129 [2022-03-01 17:37:23,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:37:23,785 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:23,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 347 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 873 Invalid, 0 Unknown, 196 Unchecked, 0.4s Time] [2022-03-01 17:37:23,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-03-01 17:37:23,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1752. [2022-03-01 17:37:23,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 3.329525985151342) internal successors, (5830), 1751 states have internal predecessors, (5830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:23,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 5830 transitions. [2022-03-01 17:37:23,807 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 5830 transitions. Word has length 24 [2022-03-01 17:37:23,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:23,807 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 5830 transitions. [2022-03-01 17:37:23,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:23,807 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 5830 transitions. [2022-03-01 17:37:23,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:23,809 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:23,809 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:23,831 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-03-01 17:37:24,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable267,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:24,010 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:24,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:24,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1038932809, now seen corresponding path program 253 times [2022-03-01 17:37:24,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:24,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963547520] [2022-03-01 17:37:24,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:24,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:37:24,208 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:24,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963547520] [2022-03-01 17:37:24,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963547520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:24,208 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857823483] [2022-03-01 17:37:24,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:37:24,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:24,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:24,210 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:24,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-03-01 17:37:24,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:24,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:37:24,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:24,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:24,536 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:24,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:37:24,539 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:24,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:37:24,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:37:24,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:25,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:25,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-03-01 17:37:25,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:25,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:37:25,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:25,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:37:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:37:25,402 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857823483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:25,402 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:25,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:37:25,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577609931] [2022-03-01 17:37:25,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:25,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:37:25,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:25,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:37:25,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:37:25,402 INFO L87 Difference]: Start difference. First operand 1752 states and 5830 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:26,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:26,939 INFO L93 Difference]: Finished difference Result 2474 states and 7904 transitions. [2022-03-01 17:37:26,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:37:26,940 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:26,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:26,944 INFO L225 Difference]: With dead ends: 2474 [2022-03-01 17:37:26,944 INFO L226 Difference]: Without dead ends: 2350 [2022-03-01 17:37:26,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:37:26,944 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 242 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 268 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:26,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 436 Invalid, 1378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1067 Invalid, 0 Unknown, 268 Unchecked, 0.5s Time] [2022-03-01 17:37:26,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2350 states. [2022-03-01 17:37:26,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2350 to 1762. [2022-03-01 17:37:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1762 states, 1761 states have (on average 3.329358319136854) internal successors, (5863), 1761 states have internal predecessors, (5863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:26,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1762 states to 1762 states and 5863 transitions. [2022-03-01 17:37:26,969 INFO L78 Accepts]: Start accepts. Automaton has 1762 states and 5863 transitions. Word has length 24 [2022-03-01 17:37:26,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:26,969 INFO L470 AbstractCegarLoop]: Abstraction has 1762 states and 5863 transitions. [2022-03-01 17:37:26,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:26,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1762 states and 5863 transitions. [2022-03-01 17:37:26,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:26,971 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:26,971 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:26,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-03-01 17:37:27,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-03-01 17:37:27,172 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:27,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:27,172 INFO L85 PathProgramCache]: Analyzing trace with hash -566670911, now seen corresponding path program 254 times [2022-03-01 17:37:27,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:27,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320614307] [2022-03-01 17:37:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:27,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:27,330 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:27,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320614307] [2022-03-01 17:37:27,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320614307] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:27,330 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780191695] [2022-03-01 17:37:27,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:37:27,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:27,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:27,331 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:27,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-03-01 17:37:27,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:37:27,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:27,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:37:27,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:27,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:27,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:28,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:28,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:37:28,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:28,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:37:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:28,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:28,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:28,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-01 17:37:28,737 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:28,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:37:28,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:28,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:37:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:28,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780191695] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:28,766 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:28,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:37:28,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87999028] [2022-03-01 17:37:28,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:28,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:37:28,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:28,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:37:28,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:37:28,767 INFO L87 Difference]: Start difference. First operand 1762 states and 5863 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:29,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:29,150 INFO L93 Difference]: Finished difference Result 1886 states and 6207 transitions. [2022-03-01 17:37:29,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:37:29,150 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:29,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:29,153 INFO L225 Difference]: With dead ends: 1886 [2022-03-01 17:37:29,153 INFO L226 Difference]: Without dead ends: 1855 [2022-03-01 17:37:29,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:37:29,154 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 56 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 576 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:29,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 227 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 576 Invalid, 0 Unknown, 115 Unchecked, 0.2s Time] [2022-03-01 17:37:29,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1855 states. [2022-03-01 17:37:29,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1855 to 1778. [2022-03-01 17:37:29,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1778 states, 1777 states have (on average 3.3224535734383793) internal successors, (5904), 1777 states have internal predecessors, (5904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:29,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1778 states to 1778 states and 5904 transitions. [2022-03-01 17:37:29,173 INFO L78 Accepts]: Start accepts. Automaton has 1778 states and 5904 transitions. Word has length 24 [2022-03-01 17:37:29,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:29,173 INFO L470 AbstractCegarLoop]: Abstraction has 1778 states and 5904 transitions. [2022-03-01 17:37:29,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:29,173 INFO L276 IsEmpty]: Start isEmpty. Operand 1778 states and 5904 transitions. [2022-03-01 17:37:29,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:29,175 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:29,176 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:29,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-03-01 17:37:29,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-03-01 17:37:29,376 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:29,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:29,376 INFO L85 PathProgramCache]: Analyzing trace with hash -895297287, now seen corresponding path program 255 times [2022-03-01 17:37:29,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:29,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368167482] [2022-03-01 17:37:29,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:29,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:29,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:29,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368167482] [2022-03-01 17:37:29,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368167482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:29,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420860910] [2022-03-01 17:37:29,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:37:29,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:29,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:29,605 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:29,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-03-01 17:37:29,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:37:29,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:29,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:37:29,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:29,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:30,021 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:30,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:37:30,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:30,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:37:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:30,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:30,703 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:30,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-01 17:37:30,824 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:30,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:37:30,828 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:30,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:37:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:30,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420860910] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:30,852 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:30,853 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:37:30,853 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419034230] [2022-03-01 17:37:30,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:30,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:37:30,853 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:30,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:37:30,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:37:30,853 INFO L87 Difference]: Start difference. First operand 1778 states and 5904 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:31,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:31,409 INFO L93 Difference]: Finished difference Result 2203 states and 7249 transitions. [2022-03-01 17:37:31,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:37:31,409 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:31,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:31,413 INFO L225 Difference]: With dead ends: 2203 [2022-03-01 17:37:31,413 INFO L226 Difference]: Without dead ends: 2172 [2022-03-01 17:37:31,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:37:31,413 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 89 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 947 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 947 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:31,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 336 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 947 Invalid, 0 Unknown, 54 Unchecked, 0.4s Time] [2022-03-01 17:37:31,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2022-03-01 17:37:31,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 1764. [2022-03-01 17:37:31,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1764 states, 1763 states have (on average 3.328417470221214) internal successors, (5868), 1763 states have internal predecessors, (5868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:31,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1764 states to 1764 states and 5868 transitions. [2022-03-01 17:37:31,437 INFO L78 Accepts]: Start accepts. Automaton has 1764 states and 5868 transitions. Word has length 24 [2022-03-01 17:37:31,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:31,437 INFO L470 AbstractCegarLoop]: Abstraction has 1764 states and 5868 transitions. [2022-03-01 17:37:31,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:31,437 INFO L276 IsEmpty]: Start isEmpty. Operand 1764 states and 5868 transitions. [2022-03-01 17:37:31,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:31,439 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:31,439 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:31,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-03-01 17:37:31,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable270 [2022-03-01 17:37:31,640 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:31,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:31,640 INFO L85 PathProgramCache]: Analyzing trace with hash 615280617, now seen corresponding path program 256 times [2022-03-01 17:37:31,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:31,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300730270] [2022-03-01 17:37:31,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:31,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:31,882 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:31,882 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:31,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300730270] [2022-03-01 17:37:31,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300730270] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:31,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295320256] [2022-03-01 17:37:31,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:37:31,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:31,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:31,885 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:31,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-03-01 17:37:31,922 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:37:31,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:31,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:37:31,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:31,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:32,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:32,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:37:32,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:32,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:37:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:32,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:32,972 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:32,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 63 [2022-03-01 17:37:33,060 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:33,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:37:33,064 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:33,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:37:33,088 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:33,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295320256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:33,089 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:33,089 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:37:33,089 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192339483] [2022-03-01 17:37:33,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:33,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:37:33,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:33,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:37:33,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:37:33,090 INFO L87 Difference]: Start difference. First operand 1764 states and 5868 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:33,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:33,587 INFO L93 Difference]: Finished difference Result 2394 states and 7843 transitions. [2022-03-01 17:37:33,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:37:33,588 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:33,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:33,592 INFO L225 Difference]: With dead ends: 2394 [2022-03-01 17:37:33,592 INFO L226 Difference]: Without dead ends: 2272 [2022-03-01 17:37:33,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=737, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:37:33,592 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 131 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:33,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 294 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 516 Invalid, 0 Unknown, 85 Unchecked, 0.2s Time] [2022-03-01 17:37:33,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2272 states. [2022-03-01 17:37:33,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2272 to 1776. [2022-03-01 17:37:33,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1776 states, 1775 states have (on average 3.332394366197183) internal successors, (5915), 1775 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1776 states to 1776 states and 5915 transitions. [2022-03-01 17:37:33,628 INFO L78 Accepts]: Start accepts. Automaton has 1776 states and 5915 transitions. Word has length 24 [2022-03-01 17:37:33,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:33,628 INFO L470 AbstractCegarLoop]: Abstraction has 1776 states and 5915 transitions. [2022-03-01 17:37:33,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 1776 states and 5915 transitions. [2022-03-01 17:37:33,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:33,631 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:33,631 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:33,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-03-01 17:37:33,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable271,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:33,834 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:33,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:33,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1304290803, now seen corresponding path program 257 times [2022-03-01 17:37:33,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:33,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356506759] [2022-03-01 17:37:33,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:33,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:33,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:37:34,062 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:34,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356506759] [2022-03-01 17:37:34,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356506759] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:34,062 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24157740] [2022-03-01 17:37:34,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:37:34,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:34,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:34,063 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:34,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-03-01 17:37:34,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:37:34,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:34,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:37:34,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:34,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:34,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:34,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:37:34,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:34,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:37:34,373 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:37:34,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:34,963 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:34,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 45 [2022-03-01 17:37:35,030 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:35,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:37:35,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:35,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:37:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:37:35,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24157740] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:35,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:35,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:37:35,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129152348] [2022-03-01 17:37:35,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:35,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:37:35,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:35,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:37:35,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:37:35,060 INFO L87 Difference]: Start difference. First operand 1776 states and 5915 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:38,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:38,119 INFO L93 Difference]: Finished difference Result 3234 states and 10507 transitions. [2022-03-01 17:37:38,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:37:38,119 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:38,124 INFO L225 Difference]: With dead ends: 3234 [2022-03-01 17:37:38,124 INFO L226 Difference]: Without dead ends: 3032 [2022-03-01 17:37:38,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 34 SyntacticMatches, 6 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=445, Invalid=2207, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 17:37:38,125 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 344 mSDsluCounter, 846 mSDsCounter, 0 mSdLazyCounter, 1050 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 344 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 312 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:38,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [344 Valid, 383 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1050 Invalid, 0 Unknown, 312 Unchecked, 0.5s Time] [2022-03-01 17:37:38,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2022-03-01 17:37:38,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 1804. [2022-03-01 17:37:38,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1804 states, 1803 states have (on average 3.3449805879090406) internal successors, (6031), 1803 states have internal predecessors, (6031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:38,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1804 states to 1804 states and 6031 transitions. [2022-03-01 17:37:38,154 INFO L78 Accepts]: Start accepts. Automaton has 1804 states and 6031 transitions. Word has length 24 [2022-03-01 17:37:38,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:38,154 INFO L470 AbstractCegarLoop]: Abstraction has 1804 states and 6031 transitions. [2022-03-01 17:37:38,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:38,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1804 states and 6031 transitions. [2022-03-01 17:37:38,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:38,156 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:38,157 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:38,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-03-01 17:37:38,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:38,357 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:38,357 INFO L85 PathProgramCache]: Analyzing trace with hash -933283557, now seen corresponding path program 258 times [2022-03-01 17:37:38,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:38,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099684819] [2022-03-01 17:37:38,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:38,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:38,552 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:38,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099684819] [2022-03-01 17:37:38,552 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099684819] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:38,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730552778] [2022-03-01 17:37:38,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:37:38,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:38,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:38,553 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:38,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-03-01 17:37:38,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:37:38,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:38,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:37:38,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:38,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:38,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:38,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:37:38,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:38,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:37:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:38,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:39,473 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:39,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 48 [2022-03-01 17:37:39,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:39,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:37:39,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:39,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:37:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:39,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730552778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:39,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:39,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:37:39,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815414761] [2022-03-01 17:37:39,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:39,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:37:39,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:39,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:37:39,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:37:39,560 INFO L87 Difference]: Start difference. First operand 1804 states and 6031 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:41,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:41,525 INFO L93 Difference]: Finished difference Result 3080 states and 9836 transitions. [2022-03-01 17:37:41,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:37:41,525 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:41,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:41,530 INFO L225 Difference]: With dead ends: 3080 [2022-03-01 17:37:41,530 INFO L226 Difference]: Without dead ends: 2918 [2022-03-01 17:37:41,530 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=352, Invalid=1904, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:37:41,530 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 193 mSDsluCounter, 1352 mSDsCounter, 0 mSdLazyCounter, 1229 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 596 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:41,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 601 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1229 Invalid, 0 Unknown, 596 Unchecked, 0.5s Time] [2022-03-01 17:37:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2918 states. [2022-03-01 17:37:41,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2918 to 1864. [2022-03-01 17:37:41,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 3.3365539452495976) internal successors, (6216), 1863 states have internal predecessors, (6216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:41,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 6216 transitions. [2022-03-01 17:37:41,559 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 6216 transitions. Word has length 24 [2022-03-01 17:37:41,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:41,559 INFO L470 AbstractCegarLoop]: Abstraction has 1864 states and 6216 transitions. [2022-03-01 17:37:41,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:41,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 6216 transitions. [2022-03-01 17:37:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:41,561 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:41,561 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:41,577 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-03-01 17:37:41,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable273 [2022-03-01 17:37:41,762 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:41,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:41,762 INFO L85 PathProgramCache]: Analyzing trace with hash 146266719, now seen corresponding path program 259 times [2022-03-01 17:37:41,762 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:41,762 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821693411] [2022-03-01 17:37:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:41,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:41,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:41,895 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:37:41,895 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:41,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821693411] [2022-03-01 17:37:41,895 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821693411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:41,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918851257] [2022-03-01 17:37:41,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:37:41,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:41,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:41,896 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:41,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-03-01 17:37:41,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:41,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:37:41,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:41,998 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:41,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:42,400 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:42,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:37:42,403 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:42,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:37:42,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:37:42,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:43,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:43,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-03-01 17:37:43,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:43,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:37:43,201 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:43,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:37:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:37:43,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918851257] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:43,224 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:43,224 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:37:43,224 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401072344] [2022-03-01 17:37:43,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:43,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:37:43,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:43,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:37:43,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:37:43,224 INFO L87 Difference]: Start difference. First operand 1864 states and 6216 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:43,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:43,479 INFO L93 Difference]: Finished difference Result 2133 states and 7032 transitions. [2022-03-01 17:37:43,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:37:43,479 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:43,482 INFO L225 Difference]: With dead ends: 2133 [2022-03-01 17:37:43,483 INFO L226 Difference]: Without dead ends: 2057 [2022-03-01 17:37:43,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:37:43,483 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 65 mSDsluCounter, 566 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 245 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:43,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 267 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 530 Invalid, 0 Unknown, 245 Unchecked, 0.2s Time] [2022-03-01 17:37:43,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2057 states. [2022-03-01 17:37:43,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2057 to 1867. [2022-03-01 17:37:43,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.3360128617363345) internal successors, (6225), 1866 states have internal predecessors, (6225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6225 transitions. [2022-03-01 17:37:43,505 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6225 transitions. Word has length 24 [2022-03-01 17:37:43,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:43,505 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 6225 transitions. [2022-03-01 17:37:43,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:43,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6225 transitions. [2022-03-01 17:37:43,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:43,507 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:43,507 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:43,523 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Forceful destruction successful, exit code 0 [2022-03-01 17:37:43,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:43,708 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:43,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:43,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1576019039, now seen corresponding path program 260 times [2022-03-01 17:37:43,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:43,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878938845] [2022-03-01 17:37:43,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:43,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:43,838 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:43,838 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:43,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878938845] [2022-03-01 17:37:43,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878938845] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:43,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611299773] [2022-03-01 17:37:43,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:37:43,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:43,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:43,839 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:43,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-03-01 17:37:43,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:37:43,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:43,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:37:43,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:43,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:44,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:37:44,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:37:44,140 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:44,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:44,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:44,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-01 17:37:44,868 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:44,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:37:44,872 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:44,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:37:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:44,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611299773] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:44,889 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:44,889 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:37:44,889 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031915375] [2022-03-01 17:37:44,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:44,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:37:44,889 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:44,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:37:44,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:37:44,889 INFO L87 Difference]: Start difference. First operand 1867 states and 6225 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:45,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:45,790 INFO L93 Difference]: Finished difference Result 3086 states and 9837 transitions. [2022-03-01 17:37:45,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:37:45,790 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:45,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:45,795 INFO L225 Difference]: With dead ends: 3086 [2022-03-01 17:37:45,795 INFO L226 Difference]: Without dead ends: 3046 [2022-03-01 17:37:45,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=266, Invalid=1140, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:37:45,796 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 153 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1069 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1069 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:45,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 432 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1069 Invalid, 0 Unknown, 55 Unchecked, 0.5s Time] [2022-03-01 17:37:45,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2022-03-01 17:37:45,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 1940. [2022-03-01 17:37:45,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1939 states have (on average 3.3166580711707065) internal successors, (6431), 1939 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:45,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 6431 transitions. [2022-03-01 17:37:45,825 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 6431 transitions. Word has length 24 [2022-03-01 17:37:45,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:45,825 INFO L470 AbstractCegarLoop]: Abstraction has 1940 states and 6431 transitions. [2022-03-01 17:37:45,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:45,825 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 6431 transitions. [2022-03-01 17:37:45,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:45,827 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:45,827 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:45,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-03-01 17:37:46,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:46,028 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:46,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:46,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1174582817, now seen corresponding path program 261 times [2022-03-01 17:37:46,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:46,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125047531] [2022-03-01 17:37:46,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:46,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:46,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:46,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:46,160 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:46,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125047531] [2022-03-01 17:37:46,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125047531] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:46,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864118461] [2022-03-01 17:37:46,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:37:46,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:46,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:46,161 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:46,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-03-01 17:37:46,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:37:46,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:46,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:37:46,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:46,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:46,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:37:46,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-01 17:37:46,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:46,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:47,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:47,117 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-01 17:37:47,219 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:47,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:37:47,224 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:47,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:37:47,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:47,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864118461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:47,241 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:47,241 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:37:47,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427729198] [2022-03-01 17:37:47,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:47,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:37:47,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:47,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:37:47,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:37:47,241 INFO L87 Difference]: Start difference. First operand 1940 states and 6431 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:48,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:48,391 INFO L93 Difference]: Finished difference Result 3147 states and 10088 transitions. [2022-03-01 17:37:48,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:37:48,391 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:48,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:48,396 INFO L225 Difference]: With dead ends: 3147 [2022-03-01 17:37:48,396 INFO L226 Difference]: Without dead ends: 3047 [2022-03-01 17:37:48,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=279, Invalid=1127, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:37:48,397 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 213 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 1220 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:48,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 353 Invalid, 1273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1220 Invalid, 0 Unknown, 22 Unchecked, 0.5s Time] [2022-03-01 17:37:48,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3047 states. [2022-03-01 17:37:48,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3047 to 1833. [2022-03-01 17:37:48,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1833 states, 1832 states have (on average 3.3367903930131004) internal successors, (6113), 1832 states have internal predecessors, (6113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:48,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 6113 transitions. [2022-03-01 17:37:48,425 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 6113 transitions. Word has length 24 [2022-03-01 17:37:48,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:48,425 INFO L470 AbstractCegarLoop]: Abstraction has 1833 states and 6113 transitions. [2022-03-01 17:37:48,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:48,425 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 6113 transitions. [2022-03-01 17:37:48,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:48,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:48,427 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:48,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-03-01 17:37:48,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable276,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:48,628 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:48,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:48,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1742721873, now seen corresponding path program 262 times [2022-03-01 17:37:48,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:48,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891902693] [2022-03-01 17:37:48,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:48,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:48,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:48,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891902693] [2022-03-01 17:37:48,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891902693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:48,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894854829] [2022-03-01 17:37:48,827 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:37:48,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:48,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:48,828 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:48,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-03-01 17:37:48,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:37:48,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:48,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:37:48,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:48,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:48,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:49,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:49,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:37:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:49,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:49,744 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:49,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 70 [2022-03-01 17:37:49,834 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:49,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 37 [2022-03-01 17:37:49,838 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:49,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2022-03-01 17:37:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:49,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894854829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:49,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:49,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:37:49,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458685388] [2022-03-01 17:37:49,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:49,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:37:49,863 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:49,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:37:49,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:37:49,863 INFO L87 Difference]: Start difference. First operand 1833 states and 6113 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:51,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:51,065 INFO L93 Difference]: Finished difference Result 2672 states and 8428 transitions. [2022-03-01 17:37:51,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:37:51,066 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:51,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:51,070 INFO L225 Difference]: With dead ends: 2672 [2022-03-01 17:37:51,070 INFO L226 Difference]: Without dead ends: 2504 [2022-03-01 17:37:51,070 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:37:51,070 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 236 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 1005 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:51,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 405 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1005 Invalid, 0 Unknown, 85 Unchecked, 0.5s Time] [2022-03-01 17:37:51,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2022-03-01 17:37:51,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 1867. [2022-03-01 17:37:51,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1867 states, 1866 states have (on average 3.326902465166131) internal successors, (6208), 1866 states have internal predecessors, (6208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:51,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1867 states to 1867 states and 6208 transitions. [2022-03-01 17:37:51,097 INFO L78 Accepts]: Start accepts. Automaton has 1867 states and 6208 transitions. Word has length 24 [2022-03-01 17:37:51,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:51,097 INFO L470 AbstractCegarLoop]: Abstraction has 1867 states and 6208 transitions. [2022-03-01 17:37:51,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1867 states and 6208 transitions. [2022-03-01 17:37:51,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:51,100 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:51,100 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:51,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2022-03-01 17:37:51,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-03-01 17:37:51,300 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:51,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:51,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1021345439, now seen corresponding path program 263 times [2022-03-01 17:37:51,301 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:51,301 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020751646] [2022-03-01 17:37:51,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:51,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:51,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:51,467 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:37:51,468 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:51,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020751646] [2022-03-01 17:37:51,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020751646] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:51,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294882172] [2022-03-01 17:37:51,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:37:51,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:51,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:51,469 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:51,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-03-01 17:37:51,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:37:51,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:51,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:37:51,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:51,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:51,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:37:51,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:37:51,911 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:37:51,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:52,454 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:52,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 104 [2022-03-01 17:37:52,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:52,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2022-03-01 17:37:52,561 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:52,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 27 [2022-03-01 17:37:52,579 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:37:52,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294882172] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:52,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:52,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:37:52,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513103158] [2022-03-01 17:37:52,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:52,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:37:52,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:52,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:37:52,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:37:52,580 INFO L87 Difference]: Start difference. First operand 1867 states and 6208 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:53,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:53,064 INFO L93 Difference]: Finished difference Result 2377 states and 7763 transitions. [2022-03-01 17:37:53,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:37:53,065 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:53,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:53,069 INFO L225 Difference]: With dead ends: 2377 [2022-03-01 17:37:53,069 INFO L226 Difference]: Without dead ends: 2358 [2022-03-01 17:37:53,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:37:53,069 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 100 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:53,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 331 Invalid, 1016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 956 Invalid, 0 Unknown, 42 Unchecked, 0.4s Time] [2022-03-01 17:37:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2022-03-01 17:37:53,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 1859. [2022-03-01 17:37:53,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 3.3293864370290636) internal successors, (6186), 1858 states have internal predecessors, (6186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 6186 transitions. [2022-03-01 17:37:53,093 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 6186 transitions. Word has length 24 [2022-03-01 17:37:53,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:53,094 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 6186 transitions. [2022-03-01 17:37:53,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:53,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 6186 transitions. [2022-03-01 17:37:53,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:53,096 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:53,096 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:53,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-03-01 17:37:53,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-03-01 17:37:53,296 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:53,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:53,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1669178643, now seen corresponding path program 264 times [2022-03-01 17:37:53,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:53,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607588189] [2022-03-01 17:37:53,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:53,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:53,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:53,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:53,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607588189] [2022-03-01 17:37:53,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607588189] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:53,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319276671] [2022-03-01 17:37:53,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:37:53,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:53,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:53,459 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:53,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-03-01 17:37:53,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:37:53,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:53,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:37:53,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:53,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:53,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:37:53,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:53,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-01 17:37:53,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:53,761 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-03-01 17:37:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:53,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:54,538 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:54,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 133 treesize of output 123 [2022-03-01 17:37:54,810 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:54,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 69 [2022-03-01 17:37:54,816 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:54,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 55 [2022-03-01 17:37:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:54,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319276671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:54,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:54,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:37:54,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646821043] [2022-03-01 17:37:54,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:54,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:37:54,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:54,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:37:54,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:37:54,900 INFO L87 Difference]: Start difference. First operand 1859 states and 6186 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:55,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:55,206 INFO L93 Difference]: Finished difference Result 2030 states and 6663 transitions. [2022-03-01 17:37:55,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:37:55,206 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:55,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:55,210 INFO L225 Difference]: With dead ends: 2030 [2022-03-01 17:37:55,210 INFO L226 Difference]: Without dead ends: 1946 [2022-03-01 17:37:55,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:37:55,210 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 83 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:55,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 177 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 518 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-03-01 17:37:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1946 states. [2022-03-01 17:37:55,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1946 to 1864. [2022-03-01 17:37:55,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 3.3311862587224907) internal successors, (6206), 1863 states have internal predecessors, (6206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:55,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 6206 transitions. [2022-03-01 17:37:55,231 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 6206 transitions. Word has length 24 [2022-03-01 17:37:55,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:55,231 INFO L470 AbstractCegarLoop]: Abstraction has 1864 states and 6206 transitions. [2022-03-01 17:37:55,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:55,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 6206 transitions. [2022-03-01 17:37:55,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:55,233 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:55,234 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:55,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-03-01 17:37:55,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-03-01 17:37:55,434 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:55,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:55,434 INFO L85 PathProgramCache]: Analyzing trace with hash -343886093, now seen corresponding path program 265 times [2022-03-01 17:37:55,434 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:55,434 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471463515] [2022-03-01 17:37:55,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:55,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:55,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:55,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471463515] [2022-03-01 17:37:55,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471463515] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:55,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178625865] [2022-03-01 17:37:55,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:37:55,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:55,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:55,661 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:55,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-03-01 17:37:55,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:55,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:37:55,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:55,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:55,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:37:55,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:55,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-03-01 17:37:55,979 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:55,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:37:56,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:56,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:56,609 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:56,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2022-03-01 17:37:56,943 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:56,944 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 111 [2022-03-01 17:37:56,950 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:56,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 87 [2022-03-01 17:37:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:57,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178625865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:57,051 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:57,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:37:57,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067194128] [2022-03-01 17:37:57,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:57,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:37:57,051 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:57,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:37:57,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:37:57,052 INFO L87 Difference]: Start difference. First operand 1864 states and 6206 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:57,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:57,486 INFO L93 Difference]: Finished difference Result 1956 states and 6463 transitions. [2022-03-01 17:37:57,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:37:57,487 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:37:57,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:57,490 INFO L225 Difference]: With dead ends: 1956 [2022-03-01 17:37:57,490 INFO L226 Difference]: Without dead ends: 1917 [2022-03-01 17:37:57,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:37:57,490 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 44 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:57,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 263 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 653 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-03-01 17:37:57,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2022-03-01 17:37:57,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1864. [2022-03-01 17:37:57,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 3.3301127214170694) internal successors, (6204), 1863 states have internal predecessors, (6204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:57,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 6204 transitions. [2022-03-01 17:37:57,511 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 6204 transitions. Word has length 24 [2022-03-01 17:37:57,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:57,511 INFO L470 AbstractCegarLoop]: Abstraction has 1864 states and 6204 transitions. [2022-03-01 17:37:57,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:57,511 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 6204 transitions. [2022-03-01 17:37:57,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:37:57,513 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:57,513 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:57,529 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-03-01 17:37:57,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable280 [2022-03-01 17:37:57,714 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:37:57,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:57,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1977729487, now seen corresponding path program 266 times [2022-03-01 17:37:57,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:57,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901088378] [2022-03-01 17:37:57,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:57,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:58,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:58,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901088378] [2022-03-01 17:37:58,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901088378] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:58,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843351444] [2022-03-01 17:37:58,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:37:58,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:58,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:58,011 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:58,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-03-01 17:37:58,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:37:58,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:58,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:37:58,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:58,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:58,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:37:58,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:58,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-01 17:37:58,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:58,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:37:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:58,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:59,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:59,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2022-03-01 17:37:59,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:59,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-03-01 17:37:59,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:59,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-03-01 17:37:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:37:59,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843351444] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:59,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:59,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:37:59,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020370882] [2022-03-01 17:37:59,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:59,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:37:59,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:59,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:37:59,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:37:59,485 INFO L87 Difference]: Start difference. First operand 1864 states and 6204 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:00,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:00,017 INFO L93 Difference]: Finished difference Result 2013 states and 6624 transitions. [2022-03-01 17:38:00,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:38:00,017 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:00,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:00,020 INFO L225 Difference]: With dead ends: 2013 [2022-03-01 17:38:00,021 INFO L226 Difference]: Without dead ends: 1947 [2022-03-01 17:38:00,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:38:00,021 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 89 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:00,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 198 Invalid, 856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 593 Invalid, 0 Unknown, 232 Unchecked, 0.3s Time] [2022-03-01 17:38:00,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1947 states. [2022-03-01 17:38:00,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1947 to 1868. [2022-03-01 17:38:00,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1868 states, 1867 states have (on average 3.3320835565077664) internal successors, (6221), 1867 states have internal predecessors, (6221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:00,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1868 states to 1868 states and 6221 transitions. [2022-03-01 17:38:00,042 INFO L78 Accepts]: Start accepts. Automaton has 1868 states and 6221 transitions. Word has length 24 [2022-03-01 17:38:00,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:00,042 INFO L470 AbstractCegarLoop]: Abstraction has 1868 states and 6221 transitions. [2022-03-01 17:38:00,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:00,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1868 states and 6221 transitions. [2022-03-01 17:38:00,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:00,045 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:00,045 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:00,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-03-01 17:38:00,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:00,245 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:00,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:00,246 INFO L85 PathProgramCache]: Analyzing trace with hash -55237457, now seen corresponding path program 267 times [2022-03-01 17:38:00,246 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:00,246 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220457055] [2022-03-01 17:38:00,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:00,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:00,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:00,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220457055] [2022-03-01 17:38:00,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220457055] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:00,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251990569] [2022-03-01 17:38:00,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:38:00,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:00,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:00,525 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:00,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-03-01 17:38:00,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:38:00,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:00,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:00,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:00,638 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:00,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:38:00,800 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:00,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2022-03-01 17:38:00,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:00,803 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2022-03-01 17:38:00,886 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:00,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:01,396 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:01,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 122 [2022-03-01 17:38:01,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:01,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-03-01 17:38:01,676 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:01,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2022-03-01 17:38:01,714 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:01,714 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251990569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:01,714 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:01,714 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:01,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659272631] [2022-03-01 17:38:01,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:01,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:01,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:01,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:01,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:01,715 INFO L87 Difference]: Start difference. First operand 1868 states and 6221 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:02,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:02,629 INFO L93 Difference]: Finished difference Result 2066 states and 6765 transitions. [2022-03-01 17:38:02,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:38:02,630 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:02,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:02,633 INFO L225 Difference]: With dead ends: 2066 [2022-03-01 17:38:02,633 INFO L226 Difference]: Without dead ends: 1988 [2022-03-01 17:38:02,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=174, Invalid=1086, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:38:02,634 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 64 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:02,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 299 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 369 Invalid, 0 Unknown, 240 Unchecked, 0.2s Time] [2022-03-01 17:38:02,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1988 states. [2022-03-01 17:38:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1988 to 1879. [2022-03-01 17:38:02,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.334398296059638) internal successors, (6262), 1878 states have internal predecessors, (6262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:02,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6262 transitions. [2022-03-01 17:38:02,655 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6262 transitions. Word has length 24 [2022-03-01 17:38:02,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:02,655 INFO L470 AbstractCegarLoop]: Abstraction has 1879 states and 6262 transitions. [2022-03-01 17:38:02,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:02,655 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6262 transitions. [2022-03-01 17:38:02,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:02,658 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:02,658 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:02,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-03-01 17:38:02,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-03-01 17:38:02,858 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:02,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:02,859 INFO L85 PathProgramCache]: Analyzing trace with hash -1153662861, now seen corresponding path program 268 times [2022-03-01 17:38:02,859 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:02,859 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256898326] [2022-03-01 17:38:02,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:02,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:03,173 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:03,174 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:03,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256898326] [2022-03-01 17:38:03,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256898326] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:03,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364192308] [2022-03-01 17:38:03,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:38:03,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:03,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:03,175 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:03,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-03-01 17:38:03,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:38:03,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:03,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:03,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:03,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:03,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:38:03,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:03,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-03-01 17:38:03,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:03,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:38:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:03,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:04,045 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:04,045 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-01 17:38:04,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:04,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-01 17:38:04,339 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:04,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-01 17:38:04,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:04,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364192308] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:04,413 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:04,413 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:04,413 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312164055] [2022-03-01 17:38:04,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:04,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:04,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:04,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:04,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:04,413 INFO L87 Difference]: Start difference. First operand 1879 states and 6262 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:04,994 INFO L93 Difference]: Finished difference Result 1994 states and 6579 transitions. [2022-03-01 17:38:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:38:04,994 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:04,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:04,997 INFO L225 Difference]: With dead ends: 1994 [2022-03-01 17:38:04,998 INFO L226 Difference]: Without dead ends: 1959 [2022-03-01 17:38:04,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:38:04,998 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 343 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:04,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 272 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 683 Invalid, 0 Unknown, 343 Unchecked, 0.3s Time] [2022-03-01 17:38:04,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2022-03-01 17:38:05,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1879. [2022-03-01 17:38:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1879 states, 1878 states have (on average 3.3354632587859423) internal successors, (6264), 1878 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:05,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1879 states to 1879 states and 6264 transitions. [2022-03-01 17:38:05,022 INFO L78 Accepts]: Start accepts. Automaton has 1879 states and 6264 transitions. Word has length 24 [2022-03-01 17:38:05,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:05,022 INFO L470 AbstractCegarLoop]: Abstraction has 1879 states and 6264 transitions. [2022-03-01 17:38:05,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:05,022 INFO L276 IsEmpty]: Start isEmpty. Operand 1879 states and 6264 transitions. [2022-03-01 17:38:05,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:05,024 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:05,024 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:05,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Forceful destruction successful, exit code 0 [2022-03-01 17:38:05,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:05,225 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:05,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:05,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1911963491, now seen corresponding path program 269 times [2022-03-01 17:38:05,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:05,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698931792] [2022-03-01 17:38:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:05,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:05,499 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:05,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698931792] [2022-03-01 17:38:05,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698931792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:05,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227014135] [2022-03-01 17:38:05,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:38:05,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:05,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:05,500 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:05,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-03-01 17:38:05,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:38:05,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:05,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:05,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:05,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:05,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:05,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:38:05,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:05,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:38:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:05,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:06,632 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:06,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2022-03-01 17:38:06,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:06,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-03-01 17:38:06,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:06,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-03-01 17:38:06,962 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:06,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227014135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:06,962 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:06,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:06,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559004715] [2022-03-01 17:38:06,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:06,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:06,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:06,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:06,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:06,963 INFO L87 Difference]: Start difference. First operand 1879 states and 6264 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:07,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:07,390 INFO L93 Difference]: Finished difference Result 2029 states and 6681 transitions. [2022-03-01 17:38:07,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:38:07,391 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:07,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:07,394 INFO L225 Difference]: With dead ends: 2029 [2022-03-01 17:38:07,394 INFO L226 Difference]: Without dead ends: 1963 [2022-03-01 17:38:07,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:38:07,395 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 4 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:07,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 193 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 667 Invalid, 0 Unknown, 4 Unchecked, 0.3s Time] [2022-03-01 17:38:07,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1963 states. [2022-03-01 17:38:07,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1963 to 1886. [2022-03-01 17:38:07,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1886 states, 1885 states have (on average 3.33315649867374) internal successors, (6283), 1885 states have internal predecessors, (6283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:07,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 6283 transitions. [2022-03-01 17:38:07,417 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 6283 transitions. Word has length 24 [2022-03-01 17:38:07,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:07,417 INFO L470 AbstractCegarLoop]: Abstraction has 1886 states and 6283 transitions. [2022-03-01 17:38:07,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:07,417 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 6283 transitions. [2022-03-01 17:38:07,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:07,420 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:07,420 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:07,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Forceful destruction successful, exit code 0 [2022-03-01 17:38:07,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:07,620 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:07,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:07,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2027484205, now seen corresponding path program 270 times [2022-03-01 17:38:07,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:07,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872822143] [2022-03-01 17:38:07,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:07,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:07,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:07,873 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:07,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872822143] [2022-03-01 17:38:07,873 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872822143] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:07,873 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637958382] [2022-03-01 17:38:07,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:38:07,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:07,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:07,875 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:07,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-03-01 17:38:07,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:38:07,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:07,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:38:07,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:08,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:08,135 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:08,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:38:08,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:08,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:38:08,276 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:08,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:08,936 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:08,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-03-01 17:38:09,118 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:09,118 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 72 [2022-03-01 17:38:09,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:09,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2022-03-01 17:38:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:09,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637958382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:09,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:09,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:09,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430277423] [2022-03-01 17:38:09,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:09,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:09,191 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:09,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:09,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:09,192 INFO L87 Difference]: Start difference. First operand 1886 states and 6283 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:10,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:10,748 INFO L93 Difference]: Finished difference Result 2640 states and 8343 transitions. [2022-03-01 17:38:10,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:38:10,748 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:10,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:10,753 INFO L225 Difference]: With dead ends: 2640 [2022-03-01 17:38:10,753 INFO L226 Difference]: Without dead ends: 2440 [2022-03-01 17:38:10,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=277, Invalid=1445, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:38:10,753 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 246 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:10,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 383 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 852 Invalid, 0 Unknown, 120 Unchecked, 0.4s Time] [2022-03-01 17:38:10,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2022-03-01 17:38:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1915. [2022-03-01 17:38:10,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 3.343260188087774) internal successors, (6399), 1914 states have internal predecessors, (6399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:10,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 6399 transitions. [2022-03-01 17:38:10,778 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 6399 transitions. Word has length 24 [2022-03-01 17:38:10,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:10,778 INFO L470 AbstractCegarLoop]: Abstraction has 1915 states and 6399 transitions. [2022-03-01 17:38:10,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:10,778 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 6399 transitions. [2022-03-01 17:38:10,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:10,780 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:10,780 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:10,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Ended with exit code 0 [2022-03-01 17:38:10,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:10,981 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:10,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:10,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1361726115, now seen corresponding path program 271 times [2022-03-01 17:38:10,981 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:10,981 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650664925] [2022-03-01 17:38:10,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:10,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:11,240 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:38:11,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:11,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650664925] [2022-03-01 17:38:11,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650664925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:11,241 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409342799] [2022-03-01 17:38:11,241 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:38:11,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:11,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:11,242 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:11,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-03-01 17:38:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:11,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:11,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:11,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:11,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:11,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:38:11,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:11,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-03-01 17:38:11,665 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:38:11,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:12,360 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:12,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-01 17:38:12,644 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:12,645 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 109 [2022-03-01 17:38:12,651 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:12,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 85 [2022-03-01 17:38:12,717 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:38:12,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409342799] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:12,717 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:12,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:12,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616864983] [2022-03-01 17:38:12,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:12,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:12,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:12,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:12,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:12,718 INFO L87 Difference]: Start difference. First operand 1915 states and 6399 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:13,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:13,085 INFO L93 Difference]: Finished difference Result 2056 states and 6778 transitions. [2022-03-01 17:38:13,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:38:13,085 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:13,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:13,088 INFO L225 Difference]: With dead ends: 2056 [2022-03-01 17:38:13,088 INFO L226 Difference]: Without dead ends: 2002 [2022-03-01 17:38:13,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:38:13,089 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 77 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:13,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 227 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 735 Invalid, 0 Unknown, 9 Unchecked, 0.3s Time] [2022-03-01 17:38:13,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2022-03-01 17:38:13,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1924. [2022-03-01 17:38:13,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 3.343213728549142) internal successors, (6429), 1923 states have internal predecessors, (6429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:13,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 6429 transitions. [2022-03-01 17:38:13,110 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 6429 transitions. Word has length 24 [2022-03-01 17:38:13,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:13,110 INFO L470 AbstractCegarLoop]: Abstraction has 1924 states and 6429 transitions. [2022-03-01 17:38:13,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:13,110 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 6429 transitions. [2022-03-01 17:38:13,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:13,112 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:13,113 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:13,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-03-01 17:38:13,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:13,313 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:13,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:13,313 INFO L85 PathProgramCache]: Analyzing trace with hash 450043825, now seen corresponding path program 272 times [2022-03-01 17:38:13,313 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:13,313 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486433460] [2022-03-01 17:38:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:13,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:13,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:13,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:13,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486433460] [2022-03-01 17:38:13,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486433460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:13,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91886823] [2022-03-01 17:38:13,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:38:13,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:13,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:13,548 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:13,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-03-01 17:38:13,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:38:13,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:13,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:13,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:13,675 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:13,806 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:38:13,936 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:13,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:14,653 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:14,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 96 [2022-03-01 17:38:14,859 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:14,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-01 17:38:14,866 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:14,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-01 17:38:14,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:14,945 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91886823] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:14,945 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:14,945 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-03-01 17:38:14,945 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284903028] [2022-03-01 17:38:14,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:14,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:38:14,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:14,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:38:14,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:38:14,946 INFO L87 Difference]: Start difference. First operand 1924 states and 6429 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:15,327 INFO L93 Difference]: Finished difference Result 2086 states and 6860 transitions. [2022-03-01 17:38:15,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:38:15,327 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:15,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:15,331 INFO L225 Difference]: With dead ends: 2086 [2022-03-01 17:38:15,331 INFO L226 Difference]: Without dead ends: 2040 [2022-03-01 17:38:15,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:15,331 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 73 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:15,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 204 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:38:15,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2022-03-01 17:38:15,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1911. [2022-03-01 17:38:15,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.345026178010471) internal successors, (6389), 1910 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:15,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 6389 transitions. [2022-03-01 17:38:15,353 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 6389 transitions. Word has length 24 [2022-03-01 17:38:15,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:15,353 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 6389 transitions. [2022-03-01 17:38:15,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 24 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:15,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 6389 transitions. [2022-03-01 17:38:15,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:15,356 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:15,356 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:15,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-03-01 17:38:15,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-03-01 17:38:15,556 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:15,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:15,556 INFO L85 PathProgramCache]: Analyzing trace with hash 234516147, now seen corresponding path program 273 times [2022-03-01 17:38:15,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:15,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734854273] [2022-03-01 17:38:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:15,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:15,797 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:15,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734854273] [2022-03-01 17:38:15,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734854273] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:15,797 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062225085] [2022-03-01 17:38:15,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:38:15,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:15,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:15,798 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:15,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-03-01 17:38:15,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:38:15,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:15,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:15,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:15,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:16,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:16,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 50 [2022-03-01 17:38:16,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:16,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 25 [2022-03-01 17:38:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:16,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:16,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:16,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 94 [2022-03-01 17:38:17,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:17,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-01 17:38:17,012 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:17,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-01 17:38:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:17,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062225085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:17,084 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:17,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:17,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767639933] [2022-03-01 17:38:17,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:17,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:17,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:17,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:17,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:17,085 INFO L87 Difference]: Start difference. First operand 1911 states and 6389 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:17,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:17,490 INFO L93 Difference]: Finished difference Result 2041 states and 6741 transitions. [2022-03-01 17:38:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:38:17,490 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:17,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:17,493 INFO L225 Difference]: With dead ends: 2041 [2022-03-01 17:38:17,493 INFO L226 Difference]: Without dead ends: 2006 [2022-03-01 17:38:17,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:38:17,494 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 75 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:17,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 210 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 679 Invalid, 0 Unknown, 27 Unchecked, 0.3s Time] [2022-03-01 17:38:17,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2006 states. [2022-03-01 17:38:17,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2006 to 1911. [2022-03-01 17:38:17,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.345026178010471) internal successors, (6389), 1910 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 6389 transitions. [2022-03-01 17:38:17,532 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 6389 transitions. Word has length 24 [2022-03-01 17:38:17,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:17,532 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 6389 transitions. [2022-03-01 17:38:17,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 6389 transitions. [2022-03-01 17:38:17,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:17,534 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:17,534 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:17,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-03-01 17:38:17,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-03-01 17:38:17,735 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:17,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:17,736 INFO L85 PathProgramCache]: Analyzing trace with hash -784522235, now seen corresponding path program 274 times [2022-03-01 17:38:17,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:17,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849075069] [2022-03-01 17:38:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:17,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:17,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:17,920 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:17,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:17,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849075069] [2022-03-01 17:38:17,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849075069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:17,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611727455] [2022-03-01 17:38:17,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:38:17,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:17,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:17,921 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:17,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-03-01 17:38:17,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:38:17,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:17,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:17,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:18,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:18,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:38:18,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:18,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:18,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:18,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:38:18,271 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:18,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:18,643 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:18,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-03-01 17:38:18,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:18,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-03-01 17:38:18,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:18,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-03-01 17:38:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:19,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611727455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:19,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:19,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:19,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746745370] [2022-03-01 17:38:19,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:19,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:19,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:19,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:19,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:19,070 INFO L87 Difference]: Start difference. First operand 1911 states and 6389 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:19,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:19,363 INFO L93 Difference]: Finished difference Result 2018 states and 6700 transitions. [2022-03-01 17:38:19,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:38:19,363 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:19,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:19,367 INFO L225 Difference]: With dead ends: 2018 [2022-03-01 17:38:19,367 INFO L226 Difference]: Without dead ends: 1979 [2022-03-01 17:38:19,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:38:19,367 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 49 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:19,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 223 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 414 Invalid, 0 Unknown, 184 Unchecked, 0.2s Time] [2022-03-01 17:38:19,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2022-03-01 17:38:19,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1915. [2022-03-01 17:38:19,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1915 states, 1914 states have (on average 3.343260188087774) internal successors, (6399), 1914 states have internal predecessors, (6399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:19,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1915 states to 1915 states and 6399 transitions. [2022-03-01 17:38:19,388 INFO L78 Accepts]: Start accepts. Automaton has 1915 states and 6399 transitions. Word has length 24 [2022-03-01 17:38:19,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:19,388 INFO L470 AbstractCegarLoop]: Abstraction has 1915 states and 6399 transitions. [2022-03-01 17:38:19,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:19,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1915 states and 6399 transitions. [2022-03-01 17:38:19,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:19,391 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:19,391 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:19,406 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Forceful destruction successful, exit code 0 [2022-03-01 17:38:19,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-03-01 17:38:19,591 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:19,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:19,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1882947639, now seen corresponding path program 275 times [2022-03-01 17:38:19,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:19,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016259747] [2022-03-01 17:38:19,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:19,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:19,818 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:19,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016259747] [2022-03-01 17:38:19,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016259747] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:19,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637086836] [2022-03-01 17:38:19,818 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:38:19,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:19,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:19,819 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:19,820 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-03-01 17:38:19,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:38:19,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:19,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:19,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:20,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:20,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:38:20,052 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:20,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 47 [2022-03-01 17:38:20,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:20,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:38:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:20,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:20,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:20,556 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-03-01 17:38:20,875 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:20,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-03-01 17:38:20,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:20,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-03-01 17:38:20,948 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:20,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637086836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:20,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:20,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:20,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064321217] [2022-03-01 17:38:20,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:20,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:20,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:20,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:20,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:20,949 INFO L87 Difference]: Start difference. First operand 1915 states and 6399 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:21,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:21,459 INFO L93 Difference]: Finished difference Result 2028 states and 6709 transitions. [2022-03-01 17:38:21,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:38:21,460 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:21,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:21,463 INFO L225 Difference]: With dead ends: 2028 [2022-03-01 17:38:21,463 INFO L226 Difference]: Without dead ends: 1993 [2022-03-01 17:38:21,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:38:21,463 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 279 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:21,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 223 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 568 Invalid, 0 Unknown, 279 Unchecked, 0.3s Time] [2022-03-01 17:38:21,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2022-03-01 17:38:21,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1911. [2022-03-01 17:38:21,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1910 states have (on average 3.345026178010471) internal successors, (6389), 1910 states have internal predecessors, (6389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:21,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 6389 transitions. [2022-03-01 17:38:21,487 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 6389 transitions. Word has length 24 [2022-03-01 17:38:21,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:21,487 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 6389 transitions. [2022-03-01 17:38:21,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:21,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 6389 transitions. [2022-03-01 17:38:21,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:21,489 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:21,489 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:21,505 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2022-03-01 17:38:21,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2022-03-01 17:38:21,690 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:21,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:21,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1655808971, now seen corresponding path program 276 times [2022-03-01 17:38:21,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:21,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656003218] [2022-03-01 17:38:21,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:21,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:21,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:21,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:21,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:21,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656003218] [2022-03-01 17:38:21,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656003218] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:21,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204130939] [2022-03-01 17:38:21,927 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:38:21,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:21,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:21,928 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:21,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-03-01 17:38:21,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:38:21,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:21,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:21,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:22,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:22,154 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:22,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:38:22,157 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:22,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:38:22,381 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:22,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:23,124 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:23,124 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:38:23,241 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:23,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-01 17:38:23,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:23,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-01 17:38:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:23,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204130939] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:23,309 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:23,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:23,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650887663] [2022-03-01 17:38:23,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:23,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:23,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:23,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:23,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:23,309 INFO L87 Difference]: Start difference. First operand 1911 states and 6389 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:23,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:23,737 INFO L93 Difference]: Finished difference Result 2091 states and 6901 transitions. [2022-03-01 17:38:23,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:38:23,737 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:23,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:23,740 INFO L225 Difference]: With dead ends: 2091 [2022-03-01 17:38:23,740 INFO L226 Difference]: Without dead ends: 2025 [2022-03-01 17:38:23,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:38:23,741 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 67 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 722 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:23,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 256 Invalid, 898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 722 Invalid, 0 Unknown, 172 Unchecked, 0.3s Time] [2022-03-01 17:38:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2025 states. [2022-03-01 17:38:23,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2025 to 1920. [2022-03-01 17:38:23,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1920 states, 1919 states have (on average 3.343408025013028) internal successors, (6416), 1919 states have internal predecessors, (6416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:23,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1920 states to 1920 states and 6416 transitions. [2022-03-01 17:38:23,762 INFO L78 Accepts]: Start accepts. Automaton has 1920 states and 6416 transitions. Word has length 24 [2022-03-01 17:38:23,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:23,762 INFO L470 AbstractCegarLoop]: Abstraction has 1920 states and 6416 transitions. [2022-03-01 17:38:23,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:23,762 INFO L276 IsEmpty]: Start isEmpty. Operand 1920 states and 6416 transitions. [2022-03-01 17:38:23,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:23,765 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:23,765 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:23,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Ended with exit code 0 [2022-03-01 17:38:23,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:23,965 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:23,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:23,965 INFO L85 PathProgramCache]: Analyzing trace with hash 491366707, now seen corresponding path program 277 times [2022-03-01 17:38:23,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:23,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968299359] [2022-03-01 17:38:23,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:23,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:24,218 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:24,218 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968299359] [2022-03-01 17:38:24,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968299359] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:24,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584895346] [2022-03-01 17:38:24,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:38:24,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:24,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:24,220 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:24,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-03-01 17:38:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:24,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:38:24,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:24,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:24,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:24,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:38:24,450 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:24,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:38:24,651 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:24,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:25,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:25,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 48 [2022-03-01 17:38:25,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:25,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 72 [2022-03-01 17:38:25,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:25,363 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 58 [2022-03-01 17:38:25,430 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:25,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584895346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:25,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:25,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:25,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125108771] [2022-03-01 17:38:25,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:25,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:25,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:25,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:25,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:25,439 INFO L87 Difference]: Start difference. First operand 1920 states and 6416 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:25,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:25,824 INFO L93 Difference]: Finished difference Result 2147 states and 7053 transitions. [2022-03-01 17:38:25,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:38:25,824 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:25,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:25,827 INFO L225 Difference]: With dead ends: 2147 [2022-03-01 17:38:25,827 INFO L226 Difference]: Without dead ends: 2077 [2022-03-01 17:38:25,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:38:25,827 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 79 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:25,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 263 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 500 Invalid, 0 Unknown, 122 Unchecked, 0.2s Time] [2022-03-01 17:38:25,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2077 states. [2022-03-01 17:38:25,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2077 to 1925. [2022-03-01 17:38:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1925 states, 1924 states have (on average 3.3440748440748442) internal successors, (6434), 1924 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1925 states to 1925 states and 6434 transitions. [2022-03-01 17:38:25,848 INFO L78 Accepts]: Start accepts. Automaton has 1925 states and 6434 transitions. Word has length 24 [2022-03-01 17:38:25,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:25,849 INFO L470 AbstractCegarLoop]: Abstraction has 1925 states and 6434 transitions. [2022-03-01 17:38:25,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1925 states and 6434 transitions. [2022-03-01 17:38:25,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:25,851 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:25,851 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:25,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Ended with exit code 0 [2022-03-01 17:38:26,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2022-03-01 17:38:26,051 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:26,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:26,052 INFO L85 PathProgramCache]: Analyzing trace with hash 557383567, now seen corresponding path program 278 times [2022-03-01 17:38:26,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:26,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549404151] [2022-03-01 17:38:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:26,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:26,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:26,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:26,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549404151] [2022-03-01 17:38:26,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549404151] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:26,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948331610] [2022-03-01 17:38:26,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:38:26,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:26,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:26,314 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:26,315 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-03-01 17:38:26,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:38:26,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:26,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:26,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:26,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:26,540 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:26,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:38:26,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:26,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:38:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:26,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:27,508 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:27,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:38:27,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:27,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-01 17:38:27,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:27,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-01 17:38:27,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:27,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948331610] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:27,754 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:27,754 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:27,754 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818189479] [2022-03-01 17:38:27,754 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:27,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:27,754 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:27,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:27,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:27,755 INFO L87 Difference]: Start difference. First operand 1925 states and 6434 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:28,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:28,080 INFO L93 Difference]: Finished difference Result 2090 states and 6902 transitions. [2022-03-01 17:38:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:38:28,080 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:28,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:28,084 INFO L225 Difference]: With dead ends: 2090 [2022-03-01 17:38:28,084 INFO L226 Difference]: Without dead ends: 2028 [2022-03-01 17:38:28,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:38:28,084 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 80 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 317 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:28,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 219 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 561 Invalid, 0 Unknown, 317 Unchecked, 0.2s Time] [2022-03-01 17:38:28,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2022-03-01 17:38:28,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1924. [2022-03-01 17:38:28,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 3.345813832553302) internal successors, (6434), 1923 states have internal predecessors, (6434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:28,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 6434 transitions. [2022-03-01 17:38:28,106 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 6434 transitions. Word has length 24 [2022-03-01 17:38:28,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:28,106 INFO L470 AbstractCegarLoop]: Abstraction has 1924 states and 6434 transitions. [2022-03-01 17:38:28,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:28,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 6434 transitions. [2022-03-01 17:38:28,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:28,108 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:28,108 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:28,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-03-01 17:38:28,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2022-03-01 17:38:28,309 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:28,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:28,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1993174025, now seen corresponding path program 279 times [2022-03-01 17:38:28,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:28,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760571201] [2022-03-01 17:38:28,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:28,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:28,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:28,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760571201] [2022-03-01 17:38:28,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760571201] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:28,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027871138] [2022-03-01 17:38:28,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:38:28,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:28,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:28,549 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:28,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-03-01 17:38:28,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:38:28,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:28,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:28,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:28,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:28,785 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:28,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:38:28,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:28,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:38:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:28,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:29,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:29,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:38:29,727 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:29,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 111 [2022-03-01 17:38:29,734 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:29,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 87 [2022-03-01 17:38:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:29,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027871138] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:29,813 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:29,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:29,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587070484] [2022-03-01 17:38:29,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:29,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:29,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:29,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:29,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:29,814 INFO L87 Difference]: Start difference. First operand 1924 states and 6434 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:30,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:30,693 INFO L93 Difference]: Finished difference Result 2096 states and 6903 transitions. [2022-03-01 17:38:30,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:38:30,693 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:30,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:30,697 INFO L225 Difference]: With dead ends: 2096 [2022-03-01 17:38:30,697 INFO L226 Difference]: Without dead ends: 2061 [2022-03-01 17:38:30,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:38:30,697 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 117 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 650 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:30,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 221 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 650 Invalid, 0 Unknown, 7 Unchecked, 0.3s Time] [2022-03-01 17:38:30,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2061 states. [2022-03-01 17:38:30,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2061 to 1926. [2022-03-01 17:38:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.3464935064935064) internal successors, (6442), 1925 states have internal predecessors, (6442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:30,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 6442 transitions. [2022-03-01 17:38:30,719 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 6442 transitions. Word has length 24 [2022-03-01 17:38:30,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:30,719 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 6442 transitions. [2022-03-01 17:38:30,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:30,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 6442 transitions. [2022-03-01 17:38:30,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:30,721 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:30,721 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:30,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-03-01 17:38:30,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:30,922 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:30,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:30,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1540288257, now seen corresponding path program 280 times [2022-03-01 17:38:30,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:30,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675922184] [2022-03-01 17:38:30,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:30,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:31,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:31,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675922184] [2022-03-01 17:38:31,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675922184] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:31,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117186139] [2022-03-01 17:38:31,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:38:31,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:31,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:31,169 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:31,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-03-01 17:38:31,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:38:31,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:31,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:31,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:31,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:31,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:31,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:38:31,437 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:31,437 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:38:31,602 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:31,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:32,363 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:32,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:38:32,530 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:32,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 113 [2022-03-01 17:38:32,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:32,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 105 treesize of output 89 [2022-03-01 17:38:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:32,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117186139] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:32,637 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:32,637 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:32,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399218285] [2022-03-01 17:38:32,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:32,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:32,637 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:32,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:32,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:32,637 INFO L87 Difference]: Start difference. First operand 1926 states and 6442 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:33,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:33,501 INFO L93 Difference]: Finished difference Result 2239 states and 7290 transitions. [2022-03-01 17:38:33,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:38:33,501 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:33,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:33,505 INFO L225 Difference]: With dead ends: 2239 [2022-03-01 17:38:33,505 INFO L226 Difference]: Without dead ends: 2123 [2022-03-01 17:38:33,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:38:33,505 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 148 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:33,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 241 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 640 Invalid, 0 Unknown, 147 Unchecked, 0.3s Time] [2022-03-01 17:38:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-03-01 17:38:33,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1937. [2022-03-01 17:38:33,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1937 states, 1936 states have (on average 3.347107438016529) internal successors, (6480), 1936 states have internal predecessors, (6480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:33,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1937 states to 1937 states and 6480 transitions. [2022-03-01 17:38:33,527 INFO L78 Accepts]: Start accepts. Automaton has 1937 states and 6480 transitions. Word has length 24 [2022-03-01 17:38:33,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:33,527 INFO L470 AbstractCegarLoop]: Abstraction has 1937 states and 6480 transitions. [2022-03-01 17:38:33,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:33,527 INFO L276 IsEmpty]: Start isEmpty. Operand 1937 states and 6480 transitions. [2022-03-01 17:38:33,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:33,529 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:33,529 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:33,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-03-01 17:38:33,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:33,730 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:33,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:33,730 INFO L85 PathProgramCache]: Analyzing trace with hash -8275917, now seen corresponding path program 281 times [2022-03-01 17:38:33,730 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:33,730 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617846326] [2022-03-01 17:38:33,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:33,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:33,979 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:33,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:33,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617846326] [2022-03-01 17:38:33,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617846326] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:33,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731083987] [2022-03-01 17:38:33,980 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:38:33,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:33,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:33,981 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:33,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-03-01 17:38:34,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:38:34,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:34,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:34,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:34,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:34,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:34,475 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:34,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:38:34,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:34,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:38:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:34,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:35,128 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:35,128 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-01 17:38:35,220 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:35,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 56 [2022-03-01 17:38:35,226 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:35,226 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 44 [2022-03-01 17:38:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:35,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731083987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:35,299 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:35,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:35,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079340364] [2022-03-01 17:38:35,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:35,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:35,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:35,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:35,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:35,300 INFO L87 Difference]: Start difference. First operand 1937 states and 6480 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:35,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:35,718 INFO L93 Difference]: Finished difference Result 2062 states and 6834 transitions. [2022-03-01 17:38:35,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:38:35,719 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:35,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:35,722 INFO L225 Difference]: With dead ends: 2062 [2022-03-01 17:38:35,722 INFO L226 Difference]: Without dead ends: 2031 [2022-03-01 17:38:35,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:38:35,723 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 90 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 313 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:35,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 203 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 474 Invalid, 0 Unknown, 313 Unchecked, 0.2s Time] [2022-03-01 17:38:35,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2022-03-01 17:38:35,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1930. [2022-03-01 17:38:35,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 3.3447382063245206) internal successors, (6452), 1929 states have internal predecessors, (6452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:35,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 6452 transitions. [2022-03-01 17:38:35,745 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 6452 transitions. Word has length 24 [2022-03-01 17:38:35,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:35,745 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 6452 transitions. [2022-03-01 17:38:35,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:35,745 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 6452 transitions. [2022-03-01 17:38:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:35,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:35,747 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:35,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-03-01 17:38:35,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:35,948 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:35,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:35,948 INFO L85 PathProgramCache]: Analyzing trace with hash -492678687, now seen corresponding path program 282 times [2022-03-01 17:38:35,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:35,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950134938] [2022-03-01 17:38:35,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:35,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:36,166 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:36,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950134938] [2022-03-01 17:38:36,166 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950134938] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:36,166 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499143203] [2022-03-01 17:38:36,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:38:36,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:36,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:36,168 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:36,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-03-01 17:38:36,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:38:36,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:36,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:36,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:36,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:36,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:36,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:38:36,489 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:36,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2022-03-01 17:38:36,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:36,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:37,186 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:37,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:38:37,302 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:37,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-01 17:38:37,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:37,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-01 17:38:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:37,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499143203] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:37,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:37,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:37,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642805493] [2022-03-01 17:38:37,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:37,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:37,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:37,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:37,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:37,399 INFO L87 Difference]: Start difference. First operand 1930 states and 6452 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:37,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:37,783 INFO L93 Difference]: Finished difference Result 2088 states and 6884 transitions. [2022-03-01 17:38:37,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:38:37,783 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:37,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:37,786 INFO L225 Difference]: With dead ends: 2088 [2022-03-01 17:38:37,787 INFO L226 Difference]: Without dead ends: 2053 [2022-03-01 17:38:37,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:38:37,787 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 61 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:37,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 291 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 674 Invalid, 0 Unknown, 102 Unchecked, 0.3s Time] [2022-03-01 17:38:37,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2022-03-01 17:38:37,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1930. [2022-03-01 17:38:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 3.3447382063245206) internal successors, (6452), 1929 states have internal predecessors, (6452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:37,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 6452 transitions. [2022-03-01 17:38:37,809 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 6452 transitions. Word has length 24 [2022-03-01 17:38:37,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:37,809 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 6452 transitions. [2022-03-01 17:38:37,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:37,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 6452 transitions. [2022-03-01 17:38:37,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:37,811 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:37,811 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:37,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Forceful destruction successful, exit code 0 [2022-03-01 17:38:38,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable297 [2022-03-01 17:38:38,012 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:38,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:38,012 INFO L85 PathProgramCache]: Analyzing trace with hash 196331499, now seen corresponding path program 283 times [2022-03-01 17:38:38,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:38,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711443504] [2022-03-01 17:38:38,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:38,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:38,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:38,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711443504] [2022-03-01 17:38:38,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711443504] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:38,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784805559] [2022-03-01 17:38:38,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:38:38,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:38,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:38,211 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:38,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-03-01 17:38:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:38,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:38,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:38,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:38,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:38,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:38,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:38:38,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:38,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:38:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:38,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:39,509 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:39,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:38:39,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:39,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-01 17:38:39,634 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:39,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-01 17:38:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:39,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784805559] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:39,722 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:39,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:39,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974298642] [2022-03-01 17:38:39,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:39,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:39,722 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:39,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:39,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:39,722 INFO L87 Difference]: Start difference. First operand 1930 states and 6452 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:39,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:39,940 INFO L93 Difference]: Finished difference Result 2091 states and 6942 transitions. [2022-03-01 17:38:39,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:38:39,940 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:39,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:39,944 INFO L225 Difference]: With dead ends: 2091 [2022-03-01 17:38:39,944 INFO L226 Difference]: Without dead ends: 2060 [2022-03-01 17:38:39,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:39,944 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 54 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:39,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 228 Invalid, 713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 445 Invalid, 0 Unknown, 265 Unchecked, 0.2s Time] [2022-03-01 17:38:39,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2060 states. [2022-03-01 17:38:39,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2060 to 1934. [2022-03-01 17:38:39,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1934 states, 1933 states have (on average 3.3460941541645113) internal successors, (6468), 1933 states have internal predecessors, (6468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1934 states to 1934 states and 6468 transitions. [2022-03-01 17:38:39,969 INFO L78 Accepts]: Start accepts. Automaton has 1934 states and 6468 transitions. Word has length 24 [2022-03-01 17:38:39,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:39,969 INFO L470 AbstractCegarLoop]: Abstraction has 1934 states and 6468 transitions. [2022-03-01 17:38:39,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:39,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1934 states and 6468 transitions. [2022-03-01 17:38:39,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:39,971 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:39,972 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:39,988 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Forceful destruction successful, exit code 0 [2022-03-01 17:38:40,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-03-01 17:38:40,172 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:40,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:40,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1378283027, now seen corresponding path program 284 times [2022-03-01 17:38:40,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:40,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26756748] [2022-03-01 17:38:40,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:40,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:40,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:40,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26756748] [2022-03-01 17:38:40,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26756748] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:40,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115936122] [2022-03-01 17:38:40,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:38:40,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:40,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:40,438 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:40,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-03-01 17:38:40,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:38:40,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:40,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:40,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:40,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:40,696 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:40,697 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:38:40,699 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:40,699 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:38:40,859 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:40,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:41,597 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:41,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:38:41,776 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:41,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 111 [2022-03-01 17:38:41,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:41,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 87 [2022-03-01 17:38:41,874 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:41,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115936122] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:41,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:41,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:41,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440521323] [2022-03-01 17:38:41,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:41,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:41,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:41,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:41,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:41,875 INFO L87 Difference]: Start difference. First operand 1934 states and 6468 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:42,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:42,464 INFO L93 Difference]: Finished difference Result 2421 states and 7893 transitions. [2022-03-01 17:38:42,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:38:42,464 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:42,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:42,468 INFO L225 Difference]: With dead ends: 2421 [2022-03-01 17:38:42,468 INFO L226 Difference]: Without dead ends: 2332 [2022-03-01 17:38:42,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:38:42,469 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 148 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 110 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:42,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 260 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 728 Invalid, 0 Unknown, 110 Unchecked, 0.3s Time] [2022-03-01 17:38:42,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2332 states. [2022-03-01 17:38:42,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2332 to 1950. [2022-03-01 17:38:42,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1950 states, 1949 states have (on average 3.3499230374551052) internal successors, (6529), 1949 states have internal predecessors, (6529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:42,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1950 states to 1950 states and 6529 transitions. [2022-03-01 17:38:42,494 INFO L78 Accepts]: Start accepts. Automaton has 1950 states and 6529 transitions. Word has length 24 [2022-03-01 17:38:42,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:42,494 INFO L470 AbstractCegarLoop]: Abstraction has 1950 states and 6529 transitions. [2022-03-01 17:38:42,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1950 states and 6529 transitions. [2022-03-01 17:38:42,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:42,496 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:42,496 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:42,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Forceful destruction successful, exit code 0 [2022-03-01 17:38:42,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-03-01 17:38:42,697 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:42,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:42,697 INFO L85 PathProgramCache]: Analyzing trace with hash 2067293213, now seen corresponding path program 285 times [2022-03-01 17:38:42,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:42,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869372777] [2022-03-01 17:38:42,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:42,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:42,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:38:42,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:42,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869372777] [2022-03-01 17:38:42,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869372777] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:42,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157052987] [2022-03-01 17:38:42,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:38:42,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:42,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:42,948 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:42,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-03-01 17:38:42,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-03-01 17:38:42,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:42,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:42,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:43,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:43,203 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:43,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:38:43,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:43,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:38:43,359 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:38:43,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:44,098 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:44,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:38:44,215 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:44,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-01 17:38:44,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:44,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-01 17:38:44,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:38:44,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157052987] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:44,294 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:44,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:44,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399496887] [2022-03-01 17:38:44,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:44,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:44,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:44,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:44,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:44,295 INFO L87 Difference]: Start difference. First operand 1950 states and 6529 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:44,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:44,992 INFO L93 Difference]: Finished difference Result 2461 states and 8015 transitions. [2022-03-01 17:38:44,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:38:44,993 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:44,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:44,997 INFO L225 Difference]: With dead ends: 2461 [2022-03-01 17:38:44,997 INFO L226 Difference]: Without dead ends: 2407 [2022-03-01 17:38:44,997 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:38:44,997 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 154 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:44,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 252 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 612 Invalid, 0 Unknown, 50 Unchecked, 0.3s Time] [2022-03-01 17:38:44,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2407 states. [2022-03-01 17:38:45,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2407 to 1956. [2022-03-01 17:38:45,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1956 states, 1955 states have (on average 3.348849104859335) internal successors, (6547), 1955 states have internal predecessors, (6547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:45,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 6547 transitions. [2022-03-01 17:38:45,023 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 6547 transitions. Word has length 24 [2022-03-01 17:38:45,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:45,023 INFO L470 AbstractCegarLoop]: Abstraction has 1956 states and 6547 transitions. [2022-03-01 17:38:45,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:45,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 6547 transitions. [2022-03-01 17:38:45,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:45,025 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:45,025 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:45,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-03-01 17:38:45,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-03-01 17:38:45,226 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:45,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:45,226 INFO L85 PathProgramCache]: Analyzing trace with hash -170281147, now seen corresponding path program 286 times [2022-03-01 17:38:45,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:45,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593014020] [2022-03-01 17:38:45,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:45,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:45,445 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:45,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:45,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593014020] [2022-03-01 17:38:45,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593014020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:45,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294864725] [2022-03-01 17:38:45,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:38:45,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:45,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:45,446 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:45,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-03-01 17:38:45,473 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:38:45,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:45,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:45,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:45,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:45,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:45,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:38:45,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:45,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:38:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:45,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:46,602 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:46,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:38:46,780 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:46,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 111 [2022-03-01 17:38:46,786 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:46,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 87 [2022-03-01 17:38:46,887 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:46,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294864725] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:46,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:46,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:46,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779643734] [2022-03-01 17:38:46,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:46,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:46,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:46,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:46,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:46,888 INFO L87 Difference]: Start difference. First operand 1956 states and 6547 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:47,714 INFO L93 Difference]: Finished difference Result 2821 states and 9060 transitions. [2022-03-01 17:38:47,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:38:47,714 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:47,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:47,719 INFO L225 Difference]: With dead ends: 2821 [2022-03-01 17:38:47,719 INFO L226 Difference]: Without dead ends: 2768 [2022-03-01 17:38:47,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:38:47,719 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 175 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 558 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:47,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 328 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 723 Invalid, 0 Unknown, 558 Unchecked, 0.3s Time] [2022-03-01 17:38:47,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2768 states. [2022-03-01 17:38:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2768 to 2055. [2022-03-01 17:38:47,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 3.3407984420642647) internal successors, (6862), 2054 states have internal predecessors, (6862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:47,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 6862 transitions. [2022-03-01 17:38:47,747 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 6862 transitions. Word has length 24 [2022-03-01 17:38:47,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:47,747 INFO L470 AbstractCegarLoop]: Abstraction has 2055 states and 6862 transitions. [2022-03-01 17:38:47,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:47,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 6862 transitions. [2022-03-01 17:38:47,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:47,750 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:47,750 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:47,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-03-01 17:38:47,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-03-01 17:38:47,950 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:47,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:47,950 INFO L85 PathProgramCache]: Analyzing trace with hash -845663075, now seen corresponding path program 287 times [2022-03-01 17:38:47,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:47,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340231472] [2022-03-01 17:38:47,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:47,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:47,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:48,153 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:48,154 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:48,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340231472] [2022-03-01 17:38:48,154 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340231472] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:48,154 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322623669] [2022-03-01 17:38:48,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:38:48,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:48,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:48,155 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:48,155 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-03-01 17:38:48,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:38:48,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:48,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:48,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:48,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:48,446 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:48,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2022-03-01 17:38:48,448 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:48,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:38:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:48,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:49,066 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:49,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 53 [2022-03-01 17:38:49,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:49,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 50 [2022-03-01 17:38:49,145 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:49,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2022-03-01 17:38:49,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:49,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322623669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:49,191 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:49,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:49,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820863312] [2022-03-01 17:38:49,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:49,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:49,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:49,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:49,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:49,192 INFO L87 Difference]: Start difference. First operand 2055 states and 6862 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:49,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:49,621 INFO L93 Difference]: Finished difference Result 2461 states and 8070 transitions. [2022-03-01 17:38:49,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:38:49,621 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:49,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:49,625 INFO L225 Difference]: With dead ends: 2461 [2022-03-01 17:38:49,625 INFO L226 Difference]: Without dead ends: 2423 [2022-03-01 17:38:49,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:38:49,625 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 139 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:49,625 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 324 Invalid, 938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 502 Invalid, 0 Unknown, 433 Unchecked, 0.2s Time] [2022-03-01 17:38:49,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2423 states. [2022-03-01 17:38:49,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2423 to 2032. [2022-03-01 17:38:49,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2032 states, 2031 states have (on average 3.3559822747415065) internal successors, (6816), 2031 states have internal predecessors, (6816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:49,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 6816 transitions. [2022-03-01 17:38:49,652 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 6816 transitions. Word has length 24 [2022-03-01 17:38:49,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:49,652 INFO L470 AbstractCegarLoop]: Abstraction has 2032 states and 6816 transitions. [2022-03-01 17:38:49,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:49,652 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 6816 transitions. [2022-03-01 17:38:49,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:49,655 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:49,655 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:49,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Ended with exit code 0 [2022-03-01 17:38:49,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2022-03-01 17:38:49,865 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:49,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:49,865 INFO L85 PathProgramCache]: Analyzing trace with hash -313059049, now seen corresponding path program 288 times [2022-03-01 17:38:49,865 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:49,865 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004444389] [2022-03-01 17:38:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:49,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:49,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:50,082 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:50,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:50,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004444389] [2022-03-01 17:38:50,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004444389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:50,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469279288] [2022-03-01 17:38:50,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:38:50,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:50,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:50,084 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:50,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-03-01 17:38:50,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:38:50,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:50,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:38:50,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:50,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:50,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:50,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:38:50,522 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:50,522 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:38:50,579 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:50,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:51,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:51,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 51 [2022-03-01 17:38:51,279 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:51,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 73 [2022-03-01 17:38:51,285 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:51,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 57 [2022-03-01 17:38:51,346 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:51,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469279288] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:51,347 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:51,347 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:51,347 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776835260] [2022-03-01 17:38:51,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:51,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:51,347 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:51,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:51,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:51,348 INFO L87 Difference]: Start difference. First operand 2032 states and 6816 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:51,948 INFO L93 Difference]: Finished difference Result 2798 states and 9053 transitions. [2022-03-01 17:38:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:38:51,949 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:51,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:51,953 INFO L225 Difference]: With dead ends: 2798 [2022-03-01 17:38:51,953 INFO L226 Difference]: Without dead ends: 2669 [2022-03-01 17:38:51,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=861, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:38:51,954 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 130 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 453 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:51,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 336 Invalid, 929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 464 Invalid, 0 Unknown, 453 Unchecked, 0.2s Time] [2022-03-01 17:38:51,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2022-03-01 17:38:51,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2084. [2022-03-01 17:38:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 3.329812770043207) internal successors, (6936), 2083 states have internal predecessors, (6936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:51,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 6936 transitions. [2022-03-01 17:38:51,982 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 6936 transitions. Word has length 24 [2022-03-01 17:38:51,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:51,982 INFO L470 AbstractCegarLoop]: Abstraction has 2084 states and 6936 transitions. [2022-03-01 17:38:51,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:51,982 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 6936 transitions. [2022-03-01 17:38:51,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:51,985 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:51,985 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:52,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-03-01 17:38:52,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:52,185 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:52,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:52,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2030799819, now seen corresponding path program 289 times [2022-03-01 17:38:52,186 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:52,186 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3969125] [2022-03-01 17:38:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:52,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:52,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:38:52,398 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:52,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3969125] [2022-03-01 17:38:52,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3969125] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:52,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533031317] [2022-03-01 17:38:52,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:38:52,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:52,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:52,399 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:52,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-03-01 17:38:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:52,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:52,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:52,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:52,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:52,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2022-03-01 17:38:52,783 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:52,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 3 [2022-03-01 17:38:52,825 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:38:52,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:53,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:53,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:38:53,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:53,677 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 111 [2022-03-01 17:38:53,683 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:53,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 87 [2022-03-01 17:38:53,783 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:38:53,783 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533031317] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:53,783 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:53,783 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:53,783 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441987868] [2022-03-01 17:38:53,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:53,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:53,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:53,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:53,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:53,784 INFO L87 Difference]: Start difference. First operand 2084 states and 6936 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:54,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:54,207 INFO L93 Difference]: Finished difference Result 2443 states and 7952 transitions. [2022-03-01 17:38:54,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:38:54,207 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:54,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:54,212 INFO L225 Difference]: With dead ends: 2443 [2022-03-01 17:38:54,212 INFO L226 Difference]: Without dead ends: 2437 [2022-03-01 17:38:54,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:38:54,212 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 106 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 215 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:54,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 339 Invalid, 838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 615 Invalid, 0 Unknown, 215 Unchecked, 0.3s Time] [2022-03-01 17:38:54,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2022-03-01 17:38:54,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 2086. [2022-03-01 17:38:54,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 3.3290167865707434) internal successors, (6941), 2085 states have internal predecessors, (6941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:54,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 6941 transitions. [2022-03-01 17:38:54,237 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 6941 transitions. Word has length 24 [2022-03-01 17:38:54,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:54,237 INFO L470 AbstractCegarLoop]: Abstraction has 2086 states and 6941 transitions. [2022-03-01 17:38:54,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:54,238 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 6941 transitions. [2022-03-01 17:38:54,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:54,240 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:54,240 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:54,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Ended with exit code 0 [2022-03-01 17:38:54,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-03-01 17:38:54,441 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:54,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:54,441 INFO L85 PathProgramCache]: Analyzing trace with hash 574224573, now seen corresponding path program 290 times [2022-03-01 17:38:54,441 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:54,441 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855668653] [2022-03-01 17:38:54,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:54,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:54,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:38:54,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:54,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855668653] [2022-03-01 17:38:54,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855668653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:54,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550688899] [2022-03-01 17:38:54,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:38:54,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:54,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:54,659 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:54,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-03-01 17:38:54,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:38:54,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:54,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:54,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:54,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:55,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:55,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:38:55,069 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:55,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 12 [2022-03-01 17:38:55,116 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:38:55,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:55,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:55,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:38:55,953 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:55,953 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 109 [2022-03-01 17:38:55,959 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:55,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 85 [2022-03-01 17:38:56,037 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:38:56,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550688899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:56,037 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:56,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:56,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264271067] [2022-03-01 17:38:56,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:56,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:56,037 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:56,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:56,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:56,038 INFO L87 Difference]: Start difference. First operand 2086 states and 6941 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:56,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:56,303 INFO L93 Difference]: Finished difference Result 2490 states and 8162 transitions. [2022-03-01 17:38:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:38:56,303 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:56,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:56,307 INFO L225 Difference]: With dead ends: 2490 [2022-03-01 17:38:56,307 INFO L226 Difference]: Without dead ends: 2487 [2022-03-01 17:38:56,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 5 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:38:56,308 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 61 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 315 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:56,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 354 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 274 Invalid, 0 Unknown, 315 Unchecked, 0.1s Time] [2022-03-01 17:38:56,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2487 states. [2022-03-01 17:38:56,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2487 to 2064. [2022-03-01 17:38:56,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 3.3402811439650995) internal successors, (6891), 2063 states have internal predecessors, (6891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 6891 transitions. [2022-03-01 17:38:56,346 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 6891 transitions. Word has length 24 [2022-03-01 17:38:56,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:56,346 INFO L470 AbstractCegarLoop]: Abstraction has 2064 states and 6891 transitions. [2022-03-01 17:38:56,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:56,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 6891 transitions. [2022-03-01 17:38:56,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:56,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:56,349 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:56,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Forceful destruction successful, exit code 0 [2022-03-01 17:38:56,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-03-01 17:38:56,549 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:56,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:56,550 INFO L85 PathProgramCache]: Analyzing trace with hash -928413891, now seen corresponding path program 291 times [2022-03-01 17:38:56,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:56,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717737658] [2022-03-01 17:38:56,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:56,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:56,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:56,766 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:38:56,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:56,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717737658] [2022-03-01 17:38:56,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717737658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:56,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094133762] [2022-03-01 17:38:56,767 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:38:56,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:56,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:56,768 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:56,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-03-01 17:38:56,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:38:56,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:56,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:56,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:56,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:57,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:57,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:38:57,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:57,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:38:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:38:57,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:57,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:57,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:38:57,958 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:57,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 109 [2022-03-01 17:38:57,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:57,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 85 [2022-03-01 17:38:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:38:58,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094133762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:58,074 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:58,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:38:58,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674422770] [2022-03-01 17:38:58,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:58,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:38:58,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:58,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:38:58,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:38:58,075 INFO L87 Difference]: Start difference. First operand 2064 states and 6891 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:58,423 INFO L93 Difference]: Finished difference Result 2611 states and 8430 transitions. [2022-03-01 17:38:58,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:38:58,423 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:38:58,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:58,429 INFO L225 Difference]: With dead ends: 2611 [2022-03-01 17:38:58,429 INFO L226 Difference]: Without dead ends: 2538 [2022-03-01 17:38:58,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:38:58,429 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 111 mSDsluCounter, 508 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:58,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 267 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 385 Invalid, 0 Unknown, 265 Unchecked, 0.2s Time] [2022-03-01 17:38:58,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2538 states. [2022-03-01 17:38:58,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2538 to 2056. [2022-03-01 17:38:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 2055 states have (on average 3.338199513381995) internal successors, (6860), 2055 states have internal predecessors, (6860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:58,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 6860 transitions. [2022-03-01 17:38:58,463 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 6860 transitions. Word has length 24 [2022-03-01 17:38:58,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:58,463 INFO L470 AbstractCegarLoop]: Abstraction has 2056 states and 6860 transitions. [2022-03-01 17:38:58,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:58,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 6860 transitions. [2022-03-01 17:38:58,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:38:58,466 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:58,466 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:58,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-03-01 17:38:58,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:58,666 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:38:58,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:58,667 INFO L85 PathProgramCache]: Analyzing trace with hash -813016629, now seen corresponding path program 292 times [2022-03-01 17:38:58,667 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:58,667 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381983277] [2022-03-01 17:38:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:58,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:58,854 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:58,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:58,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381983277] [2022-03-01 17:38:58,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381983277] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:58,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701932839] [2022-03-01 17:38:58,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:38:58,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:58,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:58,855 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:58,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-03-01 17:38:58,882 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:38:58,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:58,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:38:58,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:58,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:58,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:38:59,186 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:59,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:38:59,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:38:59,239 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:38:59,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:59,877 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:59,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:39:00,022 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:00,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-03-01 17:39:00,029 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:00,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-03-01 17:39:00,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:00,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701932839] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:00,139 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:00,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:39:00,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496885847] [2022-03-01 17:39:00,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:00,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:39:00,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:00,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:39:00,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:39:00,140 INFO L87 Difference]: Start difference. First operand 2056 states and 6860 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:00,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:00,437 INFO L93 Difference]: Finished difference Result 2607 states and 8461 transitions. [2022-03-01 17:39:00,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:39:00,438 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:00,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:00,442 INFO L225 Difference]: With dead ends: 2607 [2022-03-01 17:39:00,442 INFO L226 Difference]: Without dead ends: 2600 [2022-03-01 17:39:00,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:39:00,443 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 113 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 390 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:00,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 310 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 327 Invalid, 0 Unknown, 390 Unchecked, 0.1s Time] [2022-03-01 17:39:00,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2600 states. [2022-03-01 17:39:00,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2600 to 2092. [2022-03-01 17:39:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 3.3256814921090387) internal successors, (6954), 2091 states have internal predecessors, (6954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:00,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 6954 transitions. [2022-03-01 17:39:00,473 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 6954 transitions. Word has length 24 [2022-03-01 17:39:00,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:00,473 INFO L470 AbstractCegarLoop]: Abstraction has 2092 states and 6954 transitions. [2022-03-01 17:39:00,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:00,473 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 6954 transitions. [2022-03-01 17:39:00,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:00,476 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:00,476 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:00,492 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Forceful destruction successful, exit code 0 [2022-03-01 17:39:00,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable307 [2022-03-01 17:39:00,676 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:00,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:00,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1937585227, now seen corresponding path program 293 times [2022-03-01 17:39:00,676 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:00,677 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56853216] [2022-03-01 17:39:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:00,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:00,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:00,867 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:00,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56853216] [2022-03-01 17:39:00,867 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56853216] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:00,867 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853309545] [2022-03-01 17:39:00,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:39:00,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:00,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:00,904 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:00,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-03-01 17:39:00,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:39:00,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:00,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:39:00,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:00,980 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:00,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:01,160 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:01,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2022-03-01 17:39:01,236 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:01,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:01,749 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:01,749 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-01 17:39:01,817 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:01,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 51 [2022-03-01 17:39:01,823 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:01,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2022-03-01 17:39:01,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:01,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853309545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:01,862 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:01,862 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:39:01,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779232812] [2022-03-01 17:39:01,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:01,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:39:01,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:01,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:39:01,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:39:01,863 INFO L87 Difference]: Start difference. First operand 2092 states and 6954 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:02,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:02,223 INFO L93 Difference]: Finished difference Result 2534 states and 8216 transitions. [2022-03-01 17:39:02,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:39:02,223 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:02,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:02,227 INFO L225 Difference]: With dead ends: 2534 [2022-03-01 17:39:02,227 INFO L226 Difference]: Without dead ends: 2486 [2022-03-01 17:39:02,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:39:02,228 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 84 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:02,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 290 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 406 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-03-01 17:39:02,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2486 states. [2022-03-01 17:39:02,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2486 to 2126. [2022-03-01 17:39:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2126 states, 2125 states have (on average 3.311058823529412) internal successors, (7036), 2125 states have internal predecessors, (7036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:02,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2126 states to 2126 states and 7036 transitions. [2022-03-01 17:39:02,256 INFO L78 Accepts]: Start accepts. Automaton has 2126 states and 7036 transitions. Word has length 24 [2022-03-01 17:39:02,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:02,257 INFO L470 AbstractCegarLoop]: Abstraction has 2126 states and 7036 transitions. [2022-03-01 17:39:02,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:02,257 INFO L276 IsEmpty]: Start isEmpty. Operand 2126 states and 7036 transitions. [2022-03-01 17:39:02,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:02,260 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:02,260 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:02,276 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Ended with exit code 0 [2022-03-01 17:39:02,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:02,460 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:02,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:02,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1956066843, now seen corresponding path program 294 times [2022-03-01 17:39:02,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:02,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069162193] [2022-03-01 17:39:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:02,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:02,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:02,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:02,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069162193] [2022-03-01 17:39:02,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069162193] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:02,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11015951] [2022-03-01 17:39:02,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:39:02,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:02,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:02,663 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:02,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-03-01 17:39:02,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:39:02,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:02,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:39:02,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:02,758 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:02,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:03,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:39:03,003 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:03,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2022-03-01 17:39:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:03,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:03,586 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:03,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 51 [2022-03-01 17:39:03,687 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:03,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 78 [2022-03-01 17:39:03,693 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:03,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 62 [2022-03-01 17:39:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:03,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11015951] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:03,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:03,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:39:03,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431604979] [2022-03-01 17:39:03,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:03,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:39:03,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:03,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:39:03,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:39:03,781 INFO L87 Difference]: Start difference. First operand 2126 states and 7036 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:04,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:04,201 INFO L93 Difference]: Finished difference Result 3037 states and 9650 transitions. [2022-03-01 17:39:04,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:39:04,201 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:04,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:04,206 INFO L225 Difference]: With dead ends: 3037 [2022-03-01 17:39:04,206 INFO L226 Difference]: Without dead ends: 2955 [2022-03-01 17:39:04,206 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:39:04,206 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 168 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 360 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:04,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 324 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 565 Invalid, 0 Unknown, 360 Unchecked, 0.3s Time] [2022-03-01 17:39:04,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2955 states. [2022-03-01 17:39:04,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2955 to 2144. [2022-03-01 17:39:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2144 states, 2143 states have (on average 3.300046663555763) internal successors, (7072), 2143 states have internal predecessors, (7072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:04,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2144 states to 2144 states and 7072 transitions. [2022-03-01 17:39:04,253 INFO L78 Accepts]: Start accepts. Automaton has 2144 states and 7072 transitions. Word has length 24 [2022-03-01 17:39:04,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:04,253 INFO L470 AbstractCegarLoop]: Abstraction has 2144 states and 7072 transitions. [2022-03-01 17:39:04,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:04,253 INFO L276 IsEmpty]: Start isEmpty. Operand 2144 states and 7072 transitions. [2022-03-01 17:39:04,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:04,256 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:04,256 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:04,288 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Ended with exit code 0 [2022-03-01 17:39:04,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable309 [2022-03-01 17:39:04,456 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:04,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:04,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1268440849, now seen corresponding path program 295 times [2022-03-01 17:39:04,457 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:04,457 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820877617] [2022-03-01 17:39:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:04,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:04,641 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:04,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820877617] [2022-03-01 17:39:04,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820877617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:04,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362944527] [2022-03-01 17:39:04,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:39:04,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:04,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:04,643 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:04,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-03-01 17:39:04,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:04,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:39:04,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:04,738 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:04,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:04,956 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:04,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:39:04,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 14 [2022-03-01 17:39:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:05,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:05,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:05,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:39:05,809 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:05,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 114 [2022-03-01 17:39:05,815 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:05,816 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 90 [2022-03-01 17:39:05,936 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:05,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362944527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:05,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:05,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:39:05,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911089568] [2022-03-01 17:39:05,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:05,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:39:05,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:05,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:39:05,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:39:05,937 INFO L87 Difference]: Start difference. First operand 2144 states and 7072 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:06,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:06,047 INFO L93 Difference]: Finished difference Result 2560 states and 8273 transitions. [2022-03-01 17:39:06,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:39:06,047 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:06,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:06,051 INFO L225 Difference]: With dead ends: 2560 [2022-03-01 17:39:06,051 INFO L226 Difference]: Without dead ends: 2557 [2022-03-01 17:39:06,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:39:06,051 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 48 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:06,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 378 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 0 Unknown, 242 Unchecked, 0.1s Time] [2022-03-01 17:39:06,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2557 states. [2022-03-01 17:39:06,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2557 to 2148. [2022-03-01 17:39:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2148 states, 2147 states have (on average 3.2985561248253377) internal successors, (7082), 2147 states have internal predecessors, (7082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2148 states to 2148 states and 7082 transitions. [2022-03-01 17:39:06,077 INFO L78 Accepts]: Start accepts. Automaton has 2148 states and 7082 transitions. Word has length 24 [2022-03-01 17:39:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:06,077 INFO L470 AbstractCegarLoop]: Abstraction has 2148 states and 7082 transitions. [2022-03-01 17:39:06,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 2148 states and 7082 transitions. [2022-03-01 17:39:06,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:06,080 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:06,080 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:06,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-03-01 17:39:06,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-03-01 17:39:06,280 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:06,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:06,280 INFO L85 PathProgramCache]: Analyzing trace with hash 56743527, now seen corresponding path program 296 times [2022-03-01 17:39:06,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:06,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178093924] [2022-03-01 17:39:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:06,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:06,472 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:39:06,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:06,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178093924] [2022-03-01 17:39:06,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178093924] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:06,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407480487] [2022-03-01 17:39:06,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:39:06,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:06,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:06,474 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:06,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-03-01 17:39:06,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:39:06,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:06,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:39:06,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:06,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:06,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:06,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:39:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:39:06,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:07,399 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:07,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:39:07,512 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:07,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-01 17:39:07,518 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:07,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-01 17:39:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:39:07,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407480487] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:07,634 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:07,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:39:07,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777260329] [2022-03-01 17:39:07,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:07,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:39:07,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:07,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:39:07,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:39:07,635 INFO L87 Difference]: Start difference. First operand 2148 states and 7082 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:07,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:07,888 INFO L93 Difference]: Finished difference Result 2529 states and 8156 transitions. [2022-03-01 17:39:07,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:39:07,889 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:07,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:07,893 INFO L225 Difference]: With dead ends: 2529 [2022-03-01 17:39:07,893 INFO L226 Difference]: Without dead ends: 2498 [2022-03-01 17:39:07,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:39:07,893 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 77 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:07,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 307 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 484 Invalid, 0 Unknown, 138 Unchecked, 0.2s Time] [2022-03-01 17:39:07,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2022-03-01 17:39:07,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2147. [2022-03-01 17:39:07,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 3.3014911463187326) internal successors, (7085), 2146 states have internal predecessors, (7085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:07,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 7085 transitions. [2022-03-01 17:39:07,920 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 7085 transitions. Word has length 24 [2022-03-01 17:39:07,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:07,920 INFO L470 AbstractCegarLoop]: Abstraction has 2147 states and 7085 transitions. [2022-03-01 17:39:07,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:07,920 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 7085 transitions. [2022-03-01 17:39:07,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:07,923 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:07,923 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:07,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-03-01 17:39:08,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-03-01 17:39:08,124 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:08,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:08,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1789243013, now seen corresponding path program 297 times [2022-03-01 17:39:08,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:08,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722636526] [2022-03-01 17:39:08,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:08,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:08,324 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:08,324 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:08,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722636526] [2022-03-01 17:39:08,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722636526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:08,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615356754] [2022-03-01 17:39:08,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:39:08,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:08,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:08,326 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:08,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-03-01 17:39:08,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:39:08,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:08,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:39:08,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:08,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:08,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:08,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:08,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:39:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:08,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:09,210 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:09,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:39:09,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:09,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-01 17:39:09,332 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:09,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-01 17:39:09,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:09,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615356754] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:09,407 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:09,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:39:09,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39733283] [2022-03-01 17:39:09,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:09,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:39:09,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:09,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:39:09,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:39:09,408 INFO L87 Difference]: Start difference. First operand 2147 states and 7085 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:10,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:10,085 INFO L93 Difference]: Finished difference Result 2511 states and 8019 transitions. [2022-03-01 17:39:10,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:39:10,085 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:10,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:10,089 INFO L225 Difference]: With dead ends: 2511 [2022-03-01 17:39:10,089 INFO L226 Difference]: Without dead ends: 2390 [2022-03-01 17:39:10,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:39:10,089 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:10,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 330 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 777 Invalid, 0 Unknown, 113 Unchecked, 0.3s Time] [2022-03-01 17:39:10,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2390 states. [2022-03-01 17:39:10,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2390 to 2165. [2022-03-01 17:39:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2164 states have (on average 3.2957486136783736) internal successors, (7132), 2164 states have internal predecessors, (7132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:10,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 7132 transitions. [2022-03-01 17:39:10,114 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 7132 transitions. Word has length 24 [2022-03-01 17:39:10,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:10,115 INFO L470 AbstractCegarLoop]: Abstraction has 2165 states and 7132 transitions. [2022-03-01 17:39:10,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:10,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 7132 transitions. [2022-03-01 17:39:10,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:10,117 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:10,117 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:10,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-03-01 17:39:10,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-03-01 17:39:10,318 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:10,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:10,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1572494725, now seen corresponding path program 298 times [2022-03-01 17:39:10,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:10,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341646699] [2022-03-01 17:39:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:10,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:10,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:39:10,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:10,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341646699] [2022-03-01 17:39:10,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341646699] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:10,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466853627] [2022-03-01 17:39:10,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:39:10,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:10,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:10,516 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:10,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-03-01 17:39:10,542 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:39:10,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:10,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:39:10,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:10,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:10,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:10,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:10,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:39:10,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:39:10,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:11,415 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:11,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 81 [2022-03-01 17:39:11,585 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:11,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 111 [2022-03-01 17:39:11,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:11,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 103 treesize of output 87 [2022-03-01 17:39:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:39:11,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466853627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:11,667 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:11,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:39:11,667 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074754595] [2022-03-01 17:39:11,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:11,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:39:11,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:11,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:39:11,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:39:11,668 INFO L87 Difference]: Start difference. First operand 2165 states and 7132 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:12,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:12,304 INFO L93 Difference]: Finished difference Result 2734 states and 8762 transitions. [2022-03-01 17:39:12,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:39:12,305 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:12,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:12,309 INFO L225 Difference]: With dead ends: 2734 [2022-03-01 17:39:12,309 INFO L226 Difference]: Without dead ends: 2672 [2022-03-01 17:39:12,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:39:12,309 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 88 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 218 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:12,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 300 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 766 Invalid, 0 Unknown, 218 Unchecked, 0.3s Time] [2022-03-01 17:39:12,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2672 states. [2022-03-01 17:39:12,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2672 to 2177. [2022-03-01 17:39:12,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2177 states, 2176 states have (on average 3.295955882352941) internal successors, (7172), 2176 states have internal predecessors, (7172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2177 states to 2177 states and 7172 transitions. [2022-03-01 17:39:12,335 INFO L78 Accepts]: Start accepts. Automaton has 2177 states and 7172 transitions. Word has length 24 [2022-03-01 17:39:12,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:12,336 INFO L470 AbstractCegarLoop]: Abstraction has 2177 states and 7172 transitions. [2022-03-01 17:39:12,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:12,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2177 states and 7172 transitions. [2022-03-01 17:39:12,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:12,338 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:12,338 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:12,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Forceful destruction successful, exit code 0 [2022-03-01 17:39:12,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:12,539 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:12,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:12,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1248252165, now seen corresponding path program 299 times [2022-03-01 17:39:12,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:12,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672766623] [2022-03-01 17:39:12,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:12,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:12,738 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:39:12,738 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:12,738 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672766623] [2022-03-01 17:39:12,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672766623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:12,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135787496] [2022-03-01 17:39:12,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:39:12,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:12,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:12,740 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:12,740 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-03-01 17:39:12,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:39:12,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:12,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:39:12,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:12,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:12,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:12,984 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:12,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2022-03-01 17:39:13,056 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:39:13,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:13,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:13,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 54 [2022-03-01 17:39:13,646 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:13,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 56 [2022-03-01 17:39:13,652 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:13,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 44 [2022-03-01 17:39:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:39:13,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135787496] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:13,720 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:13,721 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:39:13,721 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274915499] [2022-03-01 17:39:13,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:13,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:39:13,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:13,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:39:13,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:39:13,721 INFO L87 Difference]: Start difference. First operand 2177 states and 7172 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:14,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:14,190 INFO L93 Difference]: Finished difference Result 2427 states and 7814 transitions. [2022-03-01 17:39:14,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:39:14,190 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:14,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:14,194 INFO L225 Difference]: With dead ends: 2427 [2022-03-01 17:39:14,194 INFO L226 Difference]: Without dead ends: 2318 [2022-03-01 17:39:14,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=856, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:39:14,194 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 127 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 864 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:14,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 276 Invalid, 864 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 596 Invalid, 0 Unknown, 254 Unchecked, 0.2s Time] [2022-03-01 17:39:14,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2022-03-01 17:39:14,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2181. [2022-03-01 17:39:14,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2181 states, 2180 states have (on average 3.293577981651376) internal successors, (7180), 2180 states have internal predecessors, (7180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:14,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2181 states to 2181 states and 7180 transitions. [2022-03-01 17:39:14,218 INFO L78 Accepts]: Start accepts. Automaton has 2181 states and 7180 transitions. Word has length 24 [2022-03-01 17:39:14,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:14,218 INFO L470 AbstractCegarLoop]: Abstraction has 2181 states and 7180 transitions. [2022-03-01 17:39:14,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:14,218 INFO L276 IsEmpty]: Start isEmpty. Operand 2181 states and 7180 transitions. [2022-03-01 17:39:14,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:14,221 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:14,221 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:14,237 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Forceful destruction successful, exit code 0 [2022-03-01 17:39:14,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:14,421 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:14,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:14,422 INFO L85 PathProgramCache]: Analyzing trace with hash -6552151, now seen corresponding path program 300 times [2022-03-01 17:39:14,422 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:14,422 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409822921] [2022-03-01 17:39:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:14,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:14,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:14,612 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:39:14,612 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:14,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409822921] [2022-03-01 17:39:14,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409822921] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:14,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253437899] [2022-03-01 17:39:14,613 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:39:14,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:14,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:14,614 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:14,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-03-01 17:39:14,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:39:14,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:14,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:39:14,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:14,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:14,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:14,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:39:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:39:14,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:15,440 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:15,440 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 51 [2022-03-01 17:39:15,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:15,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 73 [2022-03-01 17:39:15,525 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:15,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 57 [2022-03-01 17:39:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:39:15,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253437899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:15,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:15,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:39:15,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247702555] [2022-03-01 17:39:15,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:15,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:39:15,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:15,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:39:15,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:39:15,610 INFO L87 Difference]: Start difference. First operand 2181 states and 7180 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:16,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:16,145 INFO L93 Difference]: Finished difference Result 2820 states and 8963 transitions. [2022-03-01 17:39:16,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:39:16,146 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:16,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:16,150 INFO L225 Difference]: With dead ends: 2820 [2022-03-01 17:39:16,150 INFO L226 Difference]: Without dead ends: 2704 [2022-03-01 17:39:16,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:39:16,151 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 142 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:16,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 310 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 769 Invalid, 0 Unknown, 131 Unchecked, 0.3s Time] [2022-03-01 17:39:16,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2022-03-01 17:39:16,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2175. [2022-03-01 17:39:16,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2175 states, 2174 states have (on average 3.2930082796688134) internal successors, (7159), 2174 states have internal predecessors, (7159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:16,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 7159 transitions. [2022-03-01 17:39:16,178 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 7159 transitions. Word has length 24 [2022-03-01 17:39:16,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:16,178 INFO L470 AbstractCegarLoop]: Abstraction has 2175 states and 7159 transitions. [2022-03-01 17:39:16,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 7159 transitions. [2022-03-01 17:39:16,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:16,181 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:16,181 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:16,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-03-01 17:39:16,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable315,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:16,382 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:16,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:16,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1971656619, now seen corresponding path program 301 times [2022-03-01 17:39:16,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:16,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401368306] [2022-03-01 17:39:16,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:16,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:16,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:16,558 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:16,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:16,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401368306] [2022-03-01 17:39:16,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401368306] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:16,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350654037] [2022-03-01 17:39:16,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:39:16,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:16,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:16,560 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:16,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-03-01 17:39:16,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:16,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:39:16,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:16,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:39:16,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 44 [2022-03-01 17:39:16,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2022-03-01 17:39:16,879 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:16,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:17,242 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:17,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-03-01 17:39:17,536 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:17,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 107 [2022-03-01 17:39:17,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:17,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 83 [2022-03-01 17:39:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:17,604 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [350654037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:17,604 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:17,604 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:39:17,604 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468621111] [2022-03-01 17:39:17,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:17,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:39:17,605 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:17,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:39:17,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:39:17,605 INFO L87 Difference]: Start difference. First operand 2175 states and 7159 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:18,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:18,171 INFO L93 Difference]: Finished difference Result 2359 states and 7640 transitions. [2022-03-01 17:39:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:39:18,171 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:18,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:18,175 INFO L225 Difference]: With dead ends: 2359 [2022-03-01 17:39:18,175 INFO L226 Difference]: Without dead ends: 2281 [2022-03-01 17:39:18,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:39:18,176 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 81 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:18,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 188 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:39:18,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2281 states. [2022-03-01 17:39:18,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2281 to 2170. [2022-03-01 17:39:18,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 3.289534347625634) internal successors, (7135), 2169 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:18,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 7135 transitions. [2022-03-01 17:39:18,200 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 7135 transitions. Word has length 24 [2022-03-01 17:39:18,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:18,200 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 7135 transitions. [2022-03-01 17:39:18,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:18,200 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 7135 transitions. [2022-03-01 17:39:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:18,203 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:18,203 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:18,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Ended with exit code 0 [2022-03-01 17:39:18,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-03-01 17:39:18,404 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:18,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:18,404 INFO L85 PathProgramCache]: Analyzing trace with hash 873231215, now seen corresponding path program 302 times [2022-03-01 17:39:18,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:18,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953238826] [2022-03-01 17:39:18,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:18,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:18,599 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:18,599 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:18,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953238826] [2022-03-01 17:39:18,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953238826] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:18,599 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271851958] [2022-03-01 17:39:18,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:39:18,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:18,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:18,600 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:18,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-03-01 17:39:18,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:39:18,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:18,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:39:18,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:18,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:39:18,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-03-01 17:39:18,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2022-03-01 17:39:18,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:18,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:19,259 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:19,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 75 [2022-03-01 17:39:19,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:19,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 110 [2022-03-01 17:39:19,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:19,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 86 [2022-03-01 17:39:19,587 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:19,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271851958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:19,587 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:19,587 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:39:19,587 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031319907] [2022-03-01 17:39:19,587 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:19,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:39:19,588 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:19,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:39:19,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:39:19,588 INFO L87 Difference]: Start difference. First operand 2170 states and 7135 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:20,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:20,327 INFO L93 Difference]: Finished difference Result 2396 states and 7710 transitions. [2022-03-01 17:39:20,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:39:20,327 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:20,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:20,332 INFO L225 Difference]: With dead ends: 2396 [2022-03-01 17:39:20,332 INFO L226 Difference]: Without dead ends: 2322 [2022-03-01 17:39:20,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 31 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:39:20,332 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 72 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:20,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 274 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 830 Invalid, 0 Unknown, 120 Unchecked, 0.4s Time] [2022-03-01 17:39:20,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2322 states. [2022-03-01 17:39:20,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2322 to 2170. [2022-03-01 17:39:20,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 3.289534347625634) internal successors, (7135), 2169 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:20,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 7135 transitions. [2022-03-01 17:39:20,360 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 7135 transitions. Word has length 24 [2022-03-01 17:39:20,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:20,360 INFO L470 AbstractCegarLoop]: Abstraction has 2170 states and 7135 transitions. [2022-03-01 17:39:20,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:20,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 7135 transitions. [2022-03-01 17:39:20,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:20,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:20,363 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:20,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Ended with exit code 0 [2022-03-01 17:39:20,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:20,563 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:20,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:20,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1089979503, now seen corresponding path program 303 times [2022-03-01 17:39:20,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:20,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813865300] [2022-03-01 17:39:20,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:20,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:39:20,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:20,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813865300] [2022-03-01 17:39:20,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813865300] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:20,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789631485] [2022-03-01 17:39:20,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:39:20,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:20,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:20,800 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:20,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-03-01 17:39:20,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:39:20,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:20,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:39:20,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:20,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:39:21,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:21,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 36 [2022-03-01 17:39:21,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:21,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 30 [2022-03-01 17:39:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:39:21,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:21,615 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:21,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 102 [2022-03-01 17:39:21,863 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:21,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 75 [2022-03-01 17:39:21,869 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:21,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 59 [2022-03-01 17:39:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-03-01 17:39:21,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789631485] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:21,924 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:21,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:39:21,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717825590] [2022-03-01 17:39:21,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:21,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:39:21,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:21,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:39:21,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:39:21,925 INFO L87 Difference]: Start difference. First operand 2170 states and 7135 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:22,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:22,842 INFO L93 Difference]: Finished difference Result 2463 states and 7895 transitions. [2022-03-01 17:39:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:39:22,842 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:22,846 INFO L225 Difference]: With dead ends: 2463 [2022-03-01 17:39:22,846 INFO L226 Difference]: Without dead ends: 2383 [2022-03-01 17:39:22,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=199, Invalid=991, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:39:22,846 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 97 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:22,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 259 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 802 Invalid, 0 Unknown, 26 Unchecked, 0.4s Time] [2022-03-01 17:39:22,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2383 states. [2022-03-01 17:39:22,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2383 to 2176. [2022-03-01 17:39:22,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2176 states, 2175 states have (on average 3.2873563218390807) internal successors, (7150), 2175 states have internal predecessors, (7150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2176 states to 2176 states and 7150 transitions. [2022-03-01 17:39:22,873 INFO L78 Accepts]: Start accepts. Automaton has 2176 states and 7150 transitions. Word has length 24 [2022-03-01 17:39:22,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:22,873 INFO L470 AbstractCegarLoop]: Abstraction has 2176 states and 7150 transitions. [2022-03-01 17:39:22,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:22,873 INFO L276 IsEmpty]: Start isEmpty. Operand 2176 states and 7150 transitions. [2022-03-01 17:39:22,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:22,876 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:22,876 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:22,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-03-01 17:39:23,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:23,076 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:23,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:23,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1334336247, now seen corresponding path program 304 times [2022-03-01 17:39:23,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:23,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144282823] [2022-03-01 17:39:23,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:23,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:23,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:23,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:23,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144282823] [2022-03-01 17:39:23,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144282823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:23,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602175664] [2022-03-01 17:39:23,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:39:23,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:23,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:23,287 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:23,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-03-01 17:39:23,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:39:23,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:23,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:39:23,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:23,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:23,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:23,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:23,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:39:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:23,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:24,309 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:24,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:39:24,465 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:39:24,465 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:39:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:24,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602175664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:24,471 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:24,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:39:24,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594931247] [2022-03-01 17:39:24,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:24,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:39:24,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:24,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:39:24,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:39:24,472 INFO L87 Difference]: Start difference. First operand 2176 states and 7150 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:24,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:24,672 INFO L93 Difference]: Finished difference Result 2360 states and 7674 transitions. [2022-03-01 17:39:24,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:39:24,673 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:24,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:24,677 INFO L225 Difference]: With dead ends: 2360 [2022-03-01 17:39:24,677 INFO L226 Difference]: Without dead ends: 2325 [2022-03-01 17:39:24,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:39:24,677 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 50 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:24,677 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 169 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 426 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-03-01 17:39:24,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2022-03-01 17:39:24,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 2180. [2022-03-01 17:39:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 3.287287746672786) internal successors, (7163), 2179 states have internal predecessors, (7163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:24,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 7163 transitions. [2022-03-01 17:39:24,705 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 7163 transitions. Word has length 24 [2022-03-01 17:39:24,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:24,705 INFO L470 AbstractCegarLoop]: Abstraction has 2180 states and 7163 transitions. [2022-03-01 17:39:24,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:24,705 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 7163 transitions. [2022-03-01 17:39:24,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:24,708 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:24,708 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:24,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-03-01 17:39:24,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2022-03-01 17:39:24,909 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:24,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:24,909 INFO L85 PathProgramCache]: Analyzing trace with hash 519583927, now seen corresponding path program 305 times [2022-03-01 17:39:24,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:24,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641513167] [2022-03-01 17:39:24,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:24,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:25,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:25,176 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:25,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641513167] [2022-03-01 17:39:25,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641513167] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:25,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824967111] [2022-03-01 17:39:25,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:39:25,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:25,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:25,178 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:25,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-03-01 17:39:25,206 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:39:25,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:25,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:39:25,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:25,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:25,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:25,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:25,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:39:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:25,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:26,329 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:26,329 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 72 [2022-03-01 17:39:26,451 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:39:26,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:39:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:26,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824967111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:26,457 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:26,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:39:26,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650697809] [2022-03-01 17:39:26,457 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:26,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:39:26,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:26,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:39:26,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:39:26,457 INFO L87 Difference]: Start difference. First operand 2180 states and 7163 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:26,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:26,734 INFO L93 Difference]: Finished difference Result 2415 states and 7810 transitions. [2022-03-01 17:39:26,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:39:26,735 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:26,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:26,739 INFO L225 Difference]: With dead ends: 2415 [2022-03-01 17:39:26,739 INFO L226 Difference]: Without dead ends: 2349 [2022-03-01 17:39:26,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:39:26,739 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 52 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:26,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 205 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 460 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-03-01 17:39:26,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2022-03-01 17:39:26,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2180. [2022-03-01 17:39:26,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 3.287287746672786) internal successors, (7163), 2179 states have internal predecessors, (7163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:26,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 7163 transitions. [2022-03-01 17:39:26,767 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 7163 transitions. Word has length 24 [2022-03-01 17:39:26,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:26,767 INFO L470 AbstractCegarLoop]: Abstraction has 2180 states and 7163 transitions. [2022-03-01 17:39:26,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:26,767 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 7163 transitions. [2022-03-01 17:39:26,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:26,770 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:26,770 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:26,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Ended with exit code 0 [2022-03-01 17:39:26,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-03-01 17:39:26,971 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:26,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:26,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1542398869, now seen corresponding path program 306 times [2022-03-01 17:39:26,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:26,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933348599] [2022-03-01 17:39:26,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:26,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:27,203 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:27,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933348599] [2022-03-01 17:39:27,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933348599] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:27,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818020809] [2022-03-01 17:39:27,203 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:39:27,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:27,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:27,204 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:27,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-03-01 17:39:27,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:39:27,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:27,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:39:27,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:27,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:27,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:27,459 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:27,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:39:27,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:27,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:28,197 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:28,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2022-03-01 17:39:28,343 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:39:28,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:39:28,349 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:28,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818020809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:28,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:28,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:39:28,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290453406] [2022-03-01 17:39:28,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:28,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:39:28,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:28,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:39:28,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:39:28,350 INFO L87 Difference]: Start difference. First operand 2180 states and 7163 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:28,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:28,639 INFO L93 Difference]: Finished difference Result 2302 states and 7522 transitions. [2022-03-01 17:39:28,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:39:28,640 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:28,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:28,644 INFO L225 Difference]: With dead ends: 2302 [2022-03-01 17:39:28,644 INFO L226 Difference]: Without dead ends: 2271 [2022-03-01 17:39:28,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=703, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:39:28,644 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 428 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:28,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 197 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 428 Invalid, 0 Unknown, 300 Unchecked, 0.2s Time] [2022-03-01 17:39:28,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2022-03-01 17:39:28,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2180. [2022-03-01 17:39:28,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2180 states, 2179 states have (on average 3.287287746672786) internal successors, (7163), 2179 states have internal predecessors, (7163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:28,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2180 states to 2180 states and 7163 transitions. [2022-03-01 17:39:28,673 INFO L78 Accepts]: Start accepts. Automaton has 2180 states and 7163 transitions. Word has length 24 [2022-03-01 17:39:28,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:28,673 INFO L470 AbstractCegarLoop]: Abstraction has 2180 states and 7163 transitions. [2022-03-01 17:39:28,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:28,673 INFO L276 IsEmpty]: Start isEmpty. Operand 2180 states and 7163 transitions. [2022-03-01 17:39:28,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:28,676 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:28,676 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:28,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-03-01 17:39:28,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2022-03-01 17:39:28,876 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:28,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:28,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1588126163, now seen corresponding path program 307 times [2022-03-01 17:39:28,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:28,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761737371] [2022-03-01 17:39:28,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:28,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:28,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:29,089 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:29,089 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:29,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761737371] [2022-03-01 17:39:29,089 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761737371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:29,089 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750821712] [2022-03-01 17:39:29,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:39:29,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:29,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:29,090 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:29,091 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-03-01 17:39:29,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:29,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:39:29,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:29,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:29,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:29,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:29,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:39:29,593 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:29,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:30,164 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:30,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-03-01 17:39:30,377 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:39:30,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:39:30,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:30,383 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750821712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:30,383 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:30,383 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:39:30,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216551020] [2022-03-01 17:39:30,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:30,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:39:30,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:30,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:39:30,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:39:30,384 INFO L87 Difference]: Start difference. First operand 2180 states and 7163 transitions. Second operand has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:31,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:31,911 INFO L93 Difference]: Finished difference Result 2904 states and 9072 transitions. [2022-03-01 17:39:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:39:31,911 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:31,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:31,916 INFO L225 Difference]: With dead ends: 2904 [2022-03-01 17:39:31,916 INFO L226 Difference]: Without dead ends: 2720 [2022-03-01 17:39:31,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=355, Invalid=1625, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:39:31,916 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 234 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:31,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 401 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 830 Invalid, 0 Unknown, 175 Unchecked, 0.4s Time] [2022-03-01 17:39:31,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2720 states. [2022-03-01 17:39:31,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2720 to 2190. [2022-03-01 17:39:31,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2190 states, 2189 states have (on average 3.2923709456372774) internal successors, (7207), 2189 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:31,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2190 states to 2190 states and 7207 transitions. [2022-03-01 17:39:31,947 INFO L78 Accepts]: Start accepts. Automaton has 2190 states and 7207 transitions. Word has length 24 [2022-03-01 17:39:31,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:31,947 INFO L470 AbstractCegarLoop]: Abstraction has 2190 states and 7207 transitions. [2022-03-01 17:39:31,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:31,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2190 states and 7207 transitions. [2022-03-01 17:39:31,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:31,950 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:31,950 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:31,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Forceful destruction successful, exit code 0 [2022-03-01 17:39:32,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-03-01 17:39:32,150 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:32,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:32,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1654143023, now seen corresponding path program 308 times [2022-03-01 17:39:32,151 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:32,151 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113333460] [2022-03-01 17:39:32,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:32,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:32,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:32,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:32,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:32,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113333460] [2022-03-01 17:39:32,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113333460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:32,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026766867] [2022-03-01 17:39:32,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:39:32,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:32,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:32,388 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:32,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-03-01 17:39:32,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:39:32,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:32,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:39:32,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:32,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:32,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:32,650 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:32,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:39:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:32,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:33,549 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:33,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 143 treesize of output 123 [2022-03-01 17:39:33,736 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:39:33,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:39:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:33,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026766867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:33,741 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:33,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:39:33,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474466835] [2022-03-01 17:39:33,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:33,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:39:33,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:33,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:39:33,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:39:33,742 INFO L87 Difference]: Start difference. First operand 2190 states and 7207 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:33,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:33,984 INFO L93 Difference]: Finished difference Result 2347 states and 7644 transitions. [2022-03-01 17:39:33,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:39:33,984 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:33,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:33,988 INFO L225 Difference]: With dead ends: 2347 [2022-03-01 17:39:33,988 INFO L226 Difference]: Without dead ends: 2328 [2022-03-01 17:39:33,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:39:33,988 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:33,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 235 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 502 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-03-01 17:39:33,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2328 states. [2022-03-01 17:39:34,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2328 to 2185. [2022-03-01 17:39:34,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2185 states, 2184 states have (on average 3.288003663003663) internal successors, (7181), 2184 states have internal predecessors, (7181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2185 states to 2185 states and 7181 transitions. [2022-03-01 17:39:34,025 INFO L78 Accepts]: Start accepts. Automaton has 2185 states and 7181 transitions. Word has length 24 [2022-03-01 17:39:34,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:34,025 INFO L470 AbstractCegarLoop]: Abstraction has 2185 states and 7181 transitions. [2022-03-01 17:39:34,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:34,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2185 states and 7181 transitions. [2022-03-01 17:39:34,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:34,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:34,028 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:34,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Forceful destruction successful, exit code 0 [2022-03-01 17:39:34,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-03-01 17:39:34,228 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:34,229 INFO L85 PathProgramCache]: Analyzing trace with hash 604080769, now seen corresponding path program 309 times [2022-03-01 17:39:34,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:34,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477448577] [2022-03-01 17:39:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:34,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:34,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:34,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477448577] [2022-03-01 17:39:34,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477448577] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:34,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974908974] [2022-03-01 17:39:34,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:39:34,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:34,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:34,419 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:34,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-03-01 17:39:34,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:39:34,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:34,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:39:34,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:34,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:34,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:34,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:34,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:39:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:34,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:35,344 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:35,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 121 [2022-03-01 17:39:35,584 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:39:35,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:39:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:35,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974908974] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:35,590 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:35,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:39:35,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259859214] [2022-03-01 17:39:35,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:35,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:39:35,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:35,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:39:35,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:39:35,591 INFO L87 Difference]: Start difference. First operand 2185 states and 7181 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:35,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:35,956 INFO L93 Difference]: Finished difference Result 2352 states and 7633 transitions. [2022-03-01 17:39:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:39:35,956 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:35,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:35,960 INFO L225 Difference]: With dead ends: 2352 [2022-03-01 17:39:35,960 INFO L226 Difference]: Without dead ends: 2317 [2022-03-01 17:39:35,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:39:35,960 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 47 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:35,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 246 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 625 Invalid, 0 Unknown, 15 Unchecked, 0.3s Time] [2022-03-01 17:39:35,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2317 states. [2022-03-01 17:39:35,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2317 to 2184. [2022-03-01 17:39:35,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2184 states, 2183 states have (on average 3.287677508016491) internal successors, (7177), 2183 states have internal predecessors, (7177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:35,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 7177 transitions. [2022-03-01 17:39:35,985 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 7177 transitions. Word has length 24 [2022-03-01 17:39:35,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:35,985 INFO L470 AbstractCegarLoop]: Abstraction has 2184 states and 7177 transitions. [2022-03-01 17:39:35,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:35,986 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 7177 transitions. [2022-03-01 17:39:35,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:35,988 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:35,988 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:36,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-03-01 17:39:36,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:36,188 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:36,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:36,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1964895897, now seen corresponding path program 310 times [2022-03-01 17:39:36,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:36,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745370927] [2022-03-01 17:39:36,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:36,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:39:36,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:36,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745370927] [2022-03-01 17:39:36,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745370927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:36,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921864046] [2022-03-01 17:39:36,364 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:39:36,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:36,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:36,365 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:36,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-03-01 17:39:36,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:39:36,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:36,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:39:36,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:36,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2022-03-01 17:39:36,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 24 [2022-03-01 17:39:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:39:36,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:37,357 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:37,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 99 [2022-03-01 17:39:37,614 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:39:37,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:39:37,619 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-01 17:39:37,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921864046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:37,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:37,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:39:37,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532144596] [2022-03-01 17:39:37,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:37,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:39:37,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:37,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:39:37,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:39:37,620 INFO L87 Difference]: Start difference. First operand 2184 states and 7177 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:39,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:39,105 INFO L93 Difference]: Finished difference Result 2834 states and 8922 transitions. [2022-03-01 17:39:39,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:39:39,105 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:39,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:39,110 INFO L225 Difference]: With dead ends: 2834 [2022-03-01 17:39:39,110 INFO L226 Difference]: Without dead ends: 2648 [2022-03-01 17:39:39,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=236, Invalid=1096, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:39:39,110 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 184 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:39,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 382 Invalid, 1282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1002 Invalid, 0 Unknown, 250 Unchecked, 0.5s Time] [2022-03-01 17:39:39,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2648 states. [2022-03-01 17:39:39,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2648 to 2157. [2022-03-01 17:39:39,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2156 states have (on average 3.2866419294990723) internal successors, (7086), 2156 states have internal predecessors, (7086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 7086 transitions. [2022-03-01 17:39:39,139 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 7086 transitions. Word has length 24 [2022-03-01 17:39:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:39,139 INFO L470 AbstractCegarLoop]: Abstraction has 2157 states and 7086 transitions. [2022-03-01 17:39:39,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 7086 transitions. [2022-03-01 17:39:39,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:39,142 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:39,142 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:39,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2022-03-01 17:39:39,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:39,342 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:39,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:39,343 INFO L85 PathProgramCache]: Analyzing trace with hash -156834861, now seen corresponding path program 311 times [2022-03-01 17:39:39,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:39,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229718864] [2022-03-01 17:39:39,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:39,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:39,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:39,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229718864] [2022-03-01 17:39:39,533 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229718864] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:39,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823254630] [2022-03-01 17:39:39,533 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:39:39,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:39,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:39,534 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:39,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-03-01 17:39:39,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:39:39,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:39,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:39:39,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:39,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:39,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:39,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:39,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:39:39,984 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:39,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:40,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:40,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 72 [2022-03-01 17:39:40,667 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:39:40,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:39:40,672 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:40,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823254630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:40,672 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:40,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-03-01 17:39:40,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263098764] [2022-03-01 17:39:40,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:40,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:39:40,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:40,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:39:40,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:39:40,673 INFO L87 Difference]: Start difference. First operand 2157 states and 7086 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:41,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:41,066 INFO L93 Difference]: Finished difference Result 2322 states and 7564 transitions. [2022-03-01 17:39:41,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:39:41,067 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:41,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:41,070 INFO L225 Difference]: With dead ends: 2322 [2022-03-01 17:39:41,070 INFO L226 Difference]: Without dead ends: 2287 [2022-03-01 17:39:41,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:39:41,071 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 59 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 448 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:41,071 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 203 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 465 Invalid, 0 Unknown, 448 Unchecked, 0.2s Time] [2022-03-01 17:39:41,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2287 states. [2022-03-01 17:39:41,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2287 to 2157. [2022-03-01 17:39:41,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2157 states, 2156 states have (on average 3.2866419294990723) internal successors, (7086), 2156 states have internal predecessors, (7086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:41,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2157 states to 2157 states and 7086 transitions. [2022-03-01 17:39:41,095 INFO L78 Accepts]: Start accepts. Automaton has 2157 states and 7086 transitions. Word has length 24 [2022-03-01 17:39:41,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:41,095 INFO L470 AbstractCegarLoop]: Abstraction has 2157 states and 7086 transitions. [2022-03-01 17:39:41,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand 2157 states and 7086 transitions. [2022-03-01 17:39:41,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:41,098 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:41,098 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:41,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-03-01 17:39:41,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2022-03-01 17:39:41,298 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:41,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:41,298 INFO L85 PathProgramCache]: Analyzing trace with hash -90818001, now seen corresponding path program 312 times [2022-03-01 17:39:41,298 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:41,298 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351698460] [2022-03-01 17:39:41,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:41,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:41,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:41,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351698460] [2022-03-01 17:39:41,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351698460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:41,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699240643] [2022-03-01 17:39:41,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:39:41,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:41,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:41,496 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:41,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-03-01 17:39:41,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:39:41,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:41,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:39:41,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:41,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:41,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:41,733 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:41,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:39:41,945 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:41,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:42,623 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:42,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 72 [2022-03-01 17:39:42,762 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:39:42,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:39:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:42,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699240643] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:42,768 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:42,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:39:42,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370053136] [2022-03-01 17:39:42,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:42,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:39:42,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:42,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:39:42,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:39:42,769 INFO L87 Difference]: Start difference. First operand 2157 states and 7086 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:43,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:43,128 INFO L93 Difference]: Finished difference Result 2326 states and 7558 transitions. [2022-03-01 17:39:43,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:39:43,129 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:43,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:43,132 INFO L225 Difference]: With dead ends: 2326 [2022-03-01 17:39:43,132 INFO L226 Difference]: Without dead ends: 2267 [2022-03-01 17:39:43,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:39:43,133 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 95 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:43,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 171 Invalid, 708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 407 Invalid, 0 Unknown, 285 Unchecked, 0.2s Time] [2022-03-01 17:39:43,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2022-03-01 17:39:43,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2158. [2022-03-01 17:39:43,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 3.2874362540565603) internal successors, (7091), 2157 states have internal predecessors, (7091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:43,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 7091 transitions. [2022-03-01 17:39:43,157 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 7091 transitions. Word has length 24 [2022-03-01 17:39:43,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:43,157 INFO L470 AbstractCegarLoop]: Abstraction has 2158 states and 7091 transitions. [2022-03-01 17:39:43,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:43,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 7091 transitions. [2022-03-01 17:39:43,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:43,159 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:43,159 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:43,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-03-01 17:39:43,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:43,360 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:43,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:43,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1653591703, now seen corresponding path program 313 times [2022-03-01 17:39:43,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:43,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627714540] [2022-03-01 17:39:43,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:43,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:43,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:43,577 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:43,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:43,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627714540] [2022-03-01 17:39:43,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627714540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:43,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510930000] [2022-03-01 17:39:43,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:39:43,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:43,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:43,578 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:43,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-03-01 17:39:43,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:43,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:39:43,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:43,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:43,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:43,850 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:43,850 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:39:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:44,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:44,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:44,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 90 [2022-03-01 17:39:44,799 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:39:44,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 29 [2022-03-01 17:39:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:44,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510930000] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:44,804 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:44,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-01 17:39:44,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977333034] [2022-03-01 17:39:44,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:44,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:39:44,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:44,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:39:44,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:39:44,805 INFO L87 Difference]: Start difference. First operand 2158 states and 7091 transitions. Second operand has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:45,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:45,096 INFO L93 Difference]: Finished difference Result 2315 states and 7520 transitions. [2022-03-01 17:39:45,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:39:45,096 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:45,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:45,100 INFO L225 Difference]: With dead ends: 2315 [2022-03-01 17:39:45,100 INFO L226 Difference]: Without dead ends: 2280 [2022-03-01 17:39:45,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:39:45,100 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 70 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:45,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 235 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 275 Unchecked, 0.1s Time] [2022-03-01 17:39:45,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2280 states. [2022-03-01 17:39:45,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2280 to 2158. [2022-03-01 17:39:45,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2158 states, 2157 states have (on average 3.2874362540565603) internal successors, (7091), 2157 states have internal predecessors, (7091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:45,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2158 states to 2158 states and 7091 transitions. [2022-03-01 17:39:45,125 INFO L78 Accepts]: Start accepts. Automaton has 2158 states and 7091 transitions. Word has length 24 [2022-03-01 17:39:45,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:45,125 INFO L470 AbstractCegarLoop]: Abstraction has 2158 states and 7091 transitions. [2022-03-01 17:39:45,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.1481481481481484) internal successors, (58), 27 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:45,125 INFO L276 IsEmpty]: Start isEmpty. Operand 2158 states and 7091 transitions. [2022-03-01 17:39:45,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:45,128 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:45,128 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:45,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Ended with exit code 0 [2022-03-01 17:39:45,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:45,328 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:45,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:45,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1014240685, now seen corresponding path program 314 times [2022-03-01 17:39:45,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:45,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374327247] [2022-03-01 17:39:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:45,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:45,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:45,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:45,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374327247] [2022-03-01 17:39:45,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374327247] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:45,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365277004] [2022-03-01 17:39:45,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:39:45,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:45,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:45,544 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:45,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-03-01 17:39:45,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:39:45,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:45,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:39:45,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:45,740 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:45,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:45,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:45,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2022-03-01 17:39:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:45,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:39:46,464 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:39:46,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 65 [2022-03-01 17:39:46,604 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:39:46,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 25 [2022-03-01 17:39:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:46,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365277004] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:39:46,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:39:46,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-03-01 17:39:46,610 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143611601] [2022-03-01 17:39:46,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:39:46,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:39:46,610 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:39:46,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:39:46,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:39:46,611 INFO L87 Difference]: Start difference. First operand 2158 states and 7091 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:47,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:39:47,268 INFO L93 Difference]: Finished difference Result 2338 states and 7573 transitions. [2022-03-01 17:39:47,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:39:47,268 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-03-01 17:39:47,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:39:47,272 INFO L225 Difference]: With dead ends: 2338 [2022-03-01 17:39:47,272 INFO L226 Difference]: Without dead ends: 2307 [2022-03-01 17:39:47,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:39:47,273 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 64 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 112 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:39:47,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 314 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 758 Invalid, 0 Unknown, 112 Unchecked, 0.3s Time] [2022-03-01 17:39:47,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2307 states. [2022-03-01 17:39:47,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2307 to 2161. [2022-03-01 17:39:47,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2161 states, 2160 states have (on average 3.2875) internal successors, (7101), 2160 states have internal predecessors, (7101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:47,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2161 states to 2161 states and 7101 transitions. [2022-03-01 17:39:47,308 INFO L78 Accepts]: Start accepts. Automaton has 2161 states and 7101 transitions. Word has length 24 [2022-03-01 17:39:47,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:39:47,308 INFO L470 AbstractCegarLoop]: Abstraction has 2161 states and 7101 transitions. [2022-03-01 17:39:47,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:39:47,309 INFO L276 IsEmpty]: Start isEmpty. Operand 2161 states and 7101 transitions. [2022-03-01 17:39:47,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-01 17:39:47,311 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:39:47,311 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:39:47,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Forceful destruction successful, exit code 0 [2022-03-01 17:39:47,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2022-03-01 17:39:47,512 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-03-01 17:39:47,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:39:47,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2142166499, now seen corresponding path program 315 times [2022-03-01 17:39:47,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:39:47,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322400207] [2022-03-01 17:39:47,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:39:47,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:39:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:39:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:47,756 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:39:47,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322400207] [2022-03-01 17:39:47,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322400207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:39:47,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127812385] [2022-03-01 17:39:47,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:39:47,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:47,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:39:47,757 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:39:47,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-03-01 17:39:47,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:39:47,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:39:47,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-01 17:39:47,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:39:47,953 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:47,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-03-01 17:39:48,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:39:48,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 37 [2022-03-01 17:39:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-03-01 17:39:48,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... Received shutdown request... [2022-03-01 17:39:48,772 WARN L244 SmtUtils]: Removed 4 from assertion stack [2022-03-01 17:39:48,774 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-03-01 17:39:48,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-03-01 17:39:48,809 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 17:39:48,809 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 17:39:48,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:39:48,991 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 41 for 37ms.. [2022-03-01 17:39:48,993 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-03-01 17:39:48,993 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-03-01 17:39:48,993 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-03-01 17:39:48,995 INFO L732 BasicCegarLoop]: Path program histogram: [315, 6, 4, 3, 3] [2022-03-01 17:39:48,997 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 17:39:48,997 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 17:39:48,999 INFO L202 PluginConnector]: Adding new model chromosome-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 05:39:48 BasicIcfg [2022-03-01 17:39:48,999 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 17:39:48,999 INFO L158 Benchmark]: Toolchain (without parser) took 730456.46ms. Allocated memory was 183.5MB in the beginning and 463.5MB in the end (delta: 280.0MB). Free memory was 142.6MB in the beginning and 161.8MB in the end (delta: -19.2MB). Peak memory consumption was 262.9MB. Max. memory is 8.0GB. [2022-03-01 17:39:48,999 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.15ms. Allocated memory is still 183.5MB. Free memory is still 143.8MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 17:39:48,999 INFO L158 Benchmark]: Boogie Procedure Inliner took 23.29ms. Allocated memory is still 183.5MB. Free memory was 142.5MB in the beginning and 141.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 17:39:48,999 INFO L158 Benchmark]: Boogie Preprocessor took 12.83ms. Allocated memory is still 183.5MB. Free memory was 141.0MB in the beginning and 140.0MB in the end (delta: 995.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-01 17:39:48,999 INFO L158 Benchmark]: RCFGBuilder took 267.21ms. Allocated memory is still 183.5MB. Free memory was 139.9MB in the beginning and 127.9MB in the end (delta: 12.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-03-01 17:39:48,999 INFO L158 Benchmark]: TraceAbstraction took 730143.10ms. Allocated memory was 183.5MB in the beginning and 463.5MB in the end (delta: 280.0MB). Free memory was 127.3MB in the beginning and 161.8MB in the end (delta: -34.5MB). Peak memory consumption was 246.1MB. Max. memory is 8.0GB. [2022-03-01 17:39:49,000 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.15ms. Allocated memory is still 183.5MB. Free memory is still 143.8MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 23.29ms. Allocated memory is still 183.5MB. Free memory was 142.5MB in the beginning and 141.0MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 12.83ms. Allocated memory is still 183.5MB. Free memory was 141.0MB in the beginning and 140.0MB in the end (delta: 995.0kB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 267.21ms. Allocated memory is still 183.5MB. Free memory was 139.9MB in the beginning and 127.9MB in the end (delta: 12.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 730143.10ms. Allocated memory was 183.5MB in the beginning and 463.5MB in the end (delta: 280.0MB). Free memory was 127.3MB in the beginning and 161.8MB in the end (delta: -34.5MB). Peak memory consumption was 246.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 107]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 41 for 37ms.. - TimeoutResultAtElement [Line: 97]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 41 for 37ms.. - TimeoutResultAtElement [Line: 101]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 41 for 37ms.. - TimeoutResultAtElement [Line: 100]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 5,while TraceCheckSpWp was constructing backward predicates,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 41 for 37ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 38 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 730.0s, OverallIterations: 331, TraceHistogramMax: 5, PathProgramHistogramMax: 315, EmptinessCheckTime: 0.6s, AutomataDifference: 219.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 34294 SdHoareTripleChecker+Valid, 98.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 34294 mSDsluCounter, 83502 SdHoareTripleChecker+Invalid, 83.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 42554 IncrementalHoareTripleChecker+Unchecked, 155632 mSDsCounter, 6938 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 220463 IncrementalHoareTripleChecker+Invalid, 269955 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6938 mSolverCounterUnsat, 6799 mSDtfsCounter, 220463 mSolverCounterSat, 0.6s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 20153 GetRequests, 10050 SyntacticMatches, 1007 SemanticMatches, 9096 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66142 ImplicationChecksByTransitivity, 255.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2190occurred in iteration=323, InterpolantAutomatonStates: 5170, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.6s AutomataMinimizationTime, 330 MinimizatonAttempts, 76072 StatesRemovedByMinimization, 328 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.5s SsaConstructionTime, 4.4s SatisfiabilityAnalysisTime, 426.1s InterpolantComputationTime, 15356 NumberOfCodeBlocks, 15313 NumberOfCodeBlocksAsserted, 1120 NumberOfCheckSat, 21929 ConstructedInterpolants, 1673 QuantifiedInterpolants, 554930 SizeOfPredicates, 4285 NumberOfNonLiveVariables, 33890 ConjunctsInSsa, 7602 ConjunctsInUnsatCore, 958 InterpolantComputations, 16 PerfectInterpolantSequences, 7094/15979 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown