/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/poker-hand-subst.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-820ea7a [2022-02-18 16:24:24,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-18 16:24:24,359 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-18 16:24:24,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-18 16:24:24,431 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 [2022-02-18 16:24:24,455 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-18 16:24:24,455 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-18 16:24:24,455 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-02-18 16:24:24,455 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-02-18 16:24:24,456 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-18 16:24:24,456 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-18 16:24:24,456 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-18 16:24:24,456 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-18 16:24:24,456 INFO L138 SettingsManager]: * Use SBE=true [2022-02-18 16:24:24,457 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-18 16:24:24,457 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-18 16:24:24,457 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-18 16:24:24,457 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-18 16:24:24,457 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-18 16:24:24,457 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-18 16:24:24,458 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-18 16:24:24,458 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-18 16:24:24,458 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-18 16:24:24,458 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-18 16:24:24,458 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-18 16:24:24,458 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-18 16:24:24,458 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-18 16:24:24,458 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-18 16:24:24,458 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-18 16:24:24,459 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-18 16:24:24,459 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-18 16:24:24,459 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-18 16:24:24,459 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-18 16:24:24,459 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-18 16:24:24,460 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-18 16:24:24,460 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-18 16:24:24,460 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-02-18 16:24:24,460 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-18 16:24:24,460 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-02-18 16:24:24,645 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-18 16:24:24,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-18 16:24:24,667 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-18 16:24:24,668 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-02-18 16:24:24,668 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-02-18 16:24:24,669 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-subst.wvr.bpl [2022-02-18 16:24:24,669 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/poker-hand-subst.wvr.bpl' [2022-02-18 16:24:24,702 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-18 16:24:24,705 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-18 16:24:24,706 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-02-18 16:24:24,706 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-02-18 16:24:24,706 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-02-18 16:24:24,716 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:24:24" (1/1) ... [2022-02-18 16:24:24,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:24:24" (1/1) ... [2022-02-18 16:24:24,740 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-02-18 16:24:24,741 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-02-18 16:24:24,745 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-18 16:24:24,745 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-18 16:24:24,745 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-18 16:24:24,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:24:24" (1/1) ... [2022-02-18 16:24:24,750 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:24:24" (1/1) ... [2022-02-18 16:24:24,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:24:24" (1/1) ... [2022-02-18 16:24:24,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:24:24" (1/1) ... [2022-02-18 16:24:24,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:24:24" (1/1) ... [2022-02-18 16:24:24,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:24:24" (1/1) ... [2022-02-18 16:24:24,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:24:24" (1/1) ... [2022-02-18 16:24:24,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-18 16:24:24,771 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-18 16:24:24,771 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-18 16:24:24,771 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-18 16:24:24,786 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:24:24" (1/1) ... [2022-02-18 16:24:24,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-18 16:24:24,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:24:24,807 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) [2022-02-18 16:24:24,816 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 [2022-02-18 16:24:24,833 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-02-18 16:24:24,833 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-02-18 16:24:24,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-02-18 16:24:24,833 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-02-18 16:24:24,833 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-02-18 16:24:24,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-02-18 16:24:24,833 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-02-18 16:24:24,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-18 16:24:24,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-18 16:24:24,833 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-02-18 16:24:24,834 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-02-18 16:24:24,834 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-02-18 16:24:24,834 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-02-18 16:24:24,874 INFO L234 CfgBuilder]: Building ICFG [2022-02-18 16:24:24,875 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-18 16:24:25,085 INFO L275 CfgBuilder]: Performing block encoding [2022-02-18 16:24:25,279 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-18 16:24:25,279 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-02-18 16:24:25,281 INFO L202 PluginConnector]: Adding new model poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:24:25 BoogieIcfgContainer [2022-02-18 16:24:25,281 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-18 16:24:25,282 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-18 16:24:25,282 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-18 16:24:25,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-18 16:24:25,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.02 04:24:24" (1/2) ... [2022-02-18 16:24:25,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3afcbcc0 and model type poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.02 04:24:25, skipping insertion in model container [2022-02-18 16:24:25,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.02 04:24:25" (2/2) ... [2022-02-18 16:24:25,294 INFO L111 eAbstractionObserver]: Analyzing ICFG poker-hand-subst.wvr.bpl [2022-02-18 16:24:25,297 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-02-18 16:24:25,297 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-18 16:24:25,297 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-18 16:24:25,297 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-02-18 16:24:25,335 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-02-18 16:24:25,374 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-18 16:24:25,379 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 [2022-02-18 16:24:25,380 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-02-18 16:24:25,386 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 35 places, 37 transitions, 98 flow [2022-02-18 16:24:25,434 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 189 states, 188 states have (on average 4.468085106382978) internal successors, (840), 188 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:25,437 INFO L276 IsEmpty]: Start isEmpty. Operand has 189 states, 188 states have (on average 4.468085106382978) internal successors, (840), 188 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:25,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-18 16:24:25,450 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:25,450 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:25,451 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:25,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:25,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1233644702, now seen corresponding path program 1 times [2022-02-18 16:24:25,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:25,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256361405] [2022-02-18 16:24:25,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:25,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:26,163 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:26,163 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256361405] [2022-02-18 16:24:26,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256361405] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:26,164 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:26,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:26,166 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174465850] [2022-02-18 16:24:26,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:26,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:26,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:26,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:26,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:26,208 INFO L87 Difference]: Start difference. First operand has 189 states, 188 states have (on average 4.468085106382978) internal successors, (840), 188 states have internal predecessors, (840), 0 states have call successors, (0), 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 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:26,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:26,763 INFO L93 Difference]: Finished difference Result 643 states and 2716 transitions. [2022-02-18 16:24:26,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-18 16:24:26,766 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-18 16:24:26,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:26,783 INFO L225 Difference]: With dead ends: 643 [2022-02-18 16:24:26,783 INFO L226 Difference]: Without dead ends: 628 [2022-02-18 16:24:26,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-18 16:24:26,788 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 70 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:26,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 30 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-18 16:24:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-02-18 16:24:26,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 197. [2022-02-18 16:24:26,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 4.459183673469388) internal successors, (874), 196 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 874 transitions. [2022-02-18 16:24:26,850 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 874 transitions. Word has length 14 [2022-02-18 16:24:26,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:26,850 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 874 transitions. [2022-02-18 16:24:26,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:26,850 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 874 transitions. [2022-02-18 16:24:26,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-18 16:24:26,852 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:26,852 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:26,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-18 16:24:26,852 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:26,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:26,853 INFO L85 PathProgramCache]: Analyzing trace with hash 2024029086, now seen corresponding path program 2 times [2022-02-18 16:24:26,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:26,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042221209] [2022-02-18 16:24:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:26,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:27,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:27,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042221209] [2022-02-18 16:24:27,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042221209] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:27,186 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:27,186 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:27,187 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094938463] [2022-02-18 16:24:27,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:27,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:27,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:27,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:27,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:27,189 INFO L87 Difference]: Start difference. First operand 197 states and 874 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:27,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:27,484 INFO L93 Difference]: Finished difference Result 489 states and 1969 transitions. [2022-02-18 16:24:27,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:27,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-18 16:24:27,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:27,487 INFO L225 Difference]: With dead ends: 489 [2022-02-18 16:24:27,487 INFO L226 Difference]: Without dead ends: 474 [2022-02-18 16:24:27,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:24:27,488 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:27,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 32 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 16:24:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-02-18 16:24:27,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 208. [2022-02-18 16:24:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 4.367149758454106) internal successors, (904), 207 states have internal predecessors, (904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:27,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 904 transitions. [2022-02-18 16:24:27,499 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 904 transitions. Word has length 14 [2022-02-18 16:24:27,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:27,499 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 904 transitions. [2022-02-18 16:24:27,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:27,500 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 904 transitions. [2022-02-18 16:24:27,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-18 16:24:27,501 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:27,501 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:27,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-18 16:24:27,501 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:27,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:27,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1840634470, now seen corresponding path program 3 times [2022-02-18 16:24:27,502 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:27,502 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292688900] [2022-02-18 16:24:27,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:27,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:27,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:27,736 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:27,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292688900] [2022-02-18 16:24:27,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292688900] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:27,736 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:27,736 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:27,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888472274] [2022-02-18 16:24:27,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:27,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:27,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:27,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:27,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:27,738 INFO L87 Difference]: Start difference. First operand 208 states and 904 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:28,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:28,166 INFO L93 Difference]: Finished difference Result 450 states and 1748 transitions. [2022-02-18 16:24:28,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:28,166 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-18 16:24:28,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:28,169 INFO L225 Difference]: With dead ends: 450 [2022-02-18 16:24:28,169 INFO L226 Difference]: Without dead ends: 435 [2022-02-18 16:24:28,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:24:28,170 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:28,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 29 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 16:24:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-02-18 16:24:28,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 215. [2022-02-18 16:24:28,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 4.373831775700935) internal successors, (936), 214 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:28,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 936 transitions. [2022-02-18 16:24:28,187 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 936 transitions. Word has length 14 [2022-02-18 16:24:28,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:28,187 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 936 transitions. [2022-02-18 16:24:28,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:28,188 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 936 transitions. [2022-02-18 16:24:28,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-18 16:24:28,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:28,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:28,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-18 16:24:28,189 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:28,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:28,189 INFO L85 PathProgramCache]: Analyzing trace with hash -867555156, now seen corresponding path program 4 times [2022-02-18 16:24:28,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:28,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854722636] [2022-02-18 16:24:28,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:28,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:28,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:28,556 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:28,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854722636] [2022-02-18 16:24:28,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854722636] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:28,556 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:28,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:28,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032232192] [2022-02-18 16:24:28,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:28,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:28,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:28,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:28,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:28,558 INFO L87 Difference]: Start difference. First operand 215 states and 936 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:28,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:28,959 INFO L93 Difference]: Finished difference Result 454 states and 1762 transitions. [2022-02-18 16:24:28,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:28,959 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-18 16:24:28,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:28,962 INFO L225 Difference]: With dead ends: 454 [2022-02-18 16:24:28,962 INFO L226 Difference]: Without dead ends: 439 [2022-02-18 16:24:28,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:24:28,963 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 46 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:28,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 30 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 16:24:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-02-18 16:24:28,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 221. [2022-02-18 16:24:28,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 4.340909090909091) internal successors, (955), 220 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:28,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 955 transitions. [2022-02-18 16:24:28,971 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 955 transitions. Word has length 14 [2022-02-18 16:24:28,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:28,971 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 955 transitions. [2022-02-18 16:24:28,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:28,971 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 955 transitions. [2022-02-18 16:24:28,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-18 16:24:28,972 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:28,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:28,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-18 16:24:28,972 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:28,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:28,973 INFO L85 PathProgramCache]: Analyzing trace with hash 922889816, now seen corresponding path program 5 times [2022-02-18 16:24:28,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:28,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552954723] [2022-02-18 16:24:28,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:28,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:28,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:29,225 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:29,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552954723] [2022-02-18 16:24:29,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552954723] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:29,226 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:29,226 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:29,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857469821] [2022-02-18 16:24:29,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:29,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:29,227 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:29,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:29,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:29,228 INFO L87 Difference]: Start difference. First operand 221 states and 955 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:29,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:29,637 INFO L93 Difference]: Finished difference Result 670 states and 2806 transitions. [2022-02-18 16:24:29,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-18 16:24:29,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-18 16:24:29,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:29,641 INFO L225 Difference]: With dead ends: 670 [2022-02-18 16:24:29,641 INFO L226 Difference]: Without dead ends: 655 [2022-02-18 16:24:29,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-18 16:24:29,642 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:29,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 31 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 16:24:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-02-18 16:24:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 223. [2022-02-18 16:24:29,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 4.36036036036036) internal successors, (968), 222 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:29,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 968 transitions. [2022-02-18 16:24:29,651 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 968 transitions. Word has length 14 [2022-02-18 16:24:29,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:29,651 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 968 transitions. [2022-02-18 16:24:29,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:29,652 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 968 transitions. [2022-02-18 16:24:29,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-18 16:24:29,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:29,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:29,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-18 16:24:29,653 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:29,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:29,653 INFO L85 PathProgramCache]: Analyzing trace with hash 594755354, now seen corresponding path program 6 times [2022-02-18 16:24:29,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:29,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480840991] [2022-02-18 16:24:29,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:29,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:29,901 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:29,902 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480840991] [2022-02-18 16:24:29,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480840991] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:29,905 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:29,905 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:29,905 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123657063] [2022-02-18 16:24:29,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:29,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:29,905 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:29,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:29,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:29,906 INFO L87 Difference]: Start difference. First operand 223 states and 968 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:30,196 INFO L93 Difference]: Finished difference Result 489 states and 1959 transitions. [2022-02-18 16:24:30,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:30,196 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-02-18 16:24:30,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:30,199 INFO L225 Difference]: With dead ends: 489 [2022-02-18 16:24:30,199 INFO L226 Difference]: Without dead ends: 474 [2022-02-18 16:24:30,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:24:30,200 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:30,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 31 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 16:24:30,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-02-18 16:24:30,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 223. [2022-02-18 16:24:30,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 4.36036036036036) internal successors, (968), 222 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 968 transitions. [2022-02-18 16:24:30,207 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 968 transitions. Word has length 14 [2022-02-18 16:24:30,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:30,207 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 968 transitions. [2022-02-18 16:24:30,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,208 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 968 transitions. [2022-02-18 16:24:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-18 16:24:30,208 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:30,208 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:30,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-18 16:24:30,209 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:30,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:30,209 INFO L85 PathProgramCache]: Analyzing trace with hash 938297835, now seen corresponding path program 1 times [2022-02-18 16:24:30,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:30,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176836600] [2022-02-18 16:24:30,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:30,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:30,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:30,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176836600] [2022-02-18 16:24:30,223 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176836600] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:30,223 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:30,223 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-18 16:24:30,223 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105978691] [2022-02-18 16:24:30,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:30,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-18 16:24:30,224 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:30,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-18 16:24:30,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:24:30,224 INFO L87 Difference]: Start difference. First operand 223 states and 968 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:30,270 INFO L93 Difference]: Finished difference Result 258 states and 1109 transitions. [2022-02-18 16:24:30,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-18 16:24:30,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-18 16:24:30,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:30,272 INFO L225 Difference]: With dead ends: 258 [2022-02-18 16:24:30,272 INFO L226 Difference]: Without dead ends: 258 [2022-02-18 16:24:30,272 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:24:30,273 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:30,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 12 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:24:30,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-18 16:24:30,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-02-18 16:24:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 4.315175097276264) internal successors, (1109), 257 states have internal predecessors, (1109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 1109 transitions. [2022-02-18 16:24:30,279 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 1109 transitions. Word has length 15 [2022-02-18 16:24:30,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:30,280 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 1109 transitions. [2022-02-18 16:24:30,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,280 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 1109 transitions. [2022-02-18 16:24:30,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-18 16:24:30,281 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:30,281 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:30,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-18 16:24:30,281 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:30,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:30,281 INFO L85 PathProgramCache]: Analyzing trace with hash -142116917, now seen corresponding path program 1 times [2022-02-18 16:24:30,281 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:30,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15431927] [2022-02-18 16:24:30,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:30,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:30,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:30,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:30,294 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:30,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15431927] [2022-02-18 16:24:30,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15431927] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:30,294 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:30,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-18 16:24:30,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902763143] [2022-02-18 16:24:30,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:30,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-18 16:24:30,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:30,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-18 16:24:30,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:24:30,295 INFO L87 Difference]: Start difference. First operand 258 states and 1109 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:30,334 INFO L93 Difference]: Finished difference Result 293 states and 1250 transitions. [2022-02-18 16:24:30,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-18 16:24:30,334 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-18 16:24:30,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:30,336 INFO L225 Difference]: With dead ends: 293 [2022-02-18 16:24:30,336 INFO L226 Difference]: Without dead ends: 293 [2022-02-18 16:24:30,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:24:30,337 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:30,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:24:30,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-02-18 16:24:30,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2022-02-18 16:24:30,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 4.280821917808219) internal successors, (1250), 292 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 1250 transitions. [2022-02-18 16:24:30,344 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 1250 transitions. Word has length 15 [2022-02-18 16:24:30,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:30,344 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 1250 transitions. [2022-02-18 16:24:30,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,344 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 1250 transitions. [2022-02-18 16:24:30,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-18 16:24:30,345 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:30,345 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:30,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-18 16:24:30,345 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:30,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:30,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1602734973, now seen corresponding path program 1 times [2022-02-18 16:24:30,346 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:30,346 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098155187] [2022-02-18 16:24:30,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:30,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:30,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:30,382 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:30,382 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098155187] [2022-02-18 16:24:30,382 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098155187] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:30,382 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:30,382 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-18 16:24:30,383 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431856203] [2022-02-18 16:24:30,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:30,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-18 16:24:30,383 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:30,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-18 16:24:30,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:24:30,384 INFO L87 Difference]: Start difference. First operand 293 states and 1250 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:30,425 INFO L93 Difference]: Finished difference Result 336 states and 1417 transitions. [2022-02-18 16:24:30,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-18 16:24:30,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-18 16:24:30,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:30,428 INFO L225 Difference]: With dead ends: 336 [2022-02-18 16:24:30,428 INFO L226 Difference]: Without dead ends: 336 [2022-02-18 16:24:30,428 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:24:30,428 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 16 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:30,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 12 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:24:30,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-02-18 16:24:30,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2022-02-18 16:24:30,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 4.2298507462686565) internal successors, (1417), 335 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 1417 transitions. [2022-02-18 16:24:30,437 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 1417 transitions. Word has length 15 [2022-02-18 16:24:30,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:30,438 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 1417 transitions. [2022-02-18 16:24:30,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,438 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 1417 transitions. [2022-02-18 16:24:30,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-18 16:24:30,439 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:30,439 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:30,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-18 16:24:30,439 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:30,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:30,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1637676883, now seen corresponding path program 1 times [2022-02-18 16:24:30,439 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:30,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858619665] [2022-02-18 16:24:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:30,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:30,453 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:30,454 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858619665] [2022-02-18 16:24:30,454 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858619665] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:30,454 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:30,454 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-18 16:24:30,454 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6841772] [2022-02-18 16:24:30,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:30,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-18 16:24:30,454 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-18 16:24:30,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:24:30,455 INFO L87 Difference]: Start difference. First operand 336 states and 1417 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:30,494 INFO L93 Difference]: Finished difference Result 386 states and 1608 transitions. [2022-02-18 16:24:30,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-18 16:24:30,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-18 16:24:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:30,497 INFO L225 Difference]: With dead ends: 386 [2022-02-18 16:24:30,497 INFO L226 Difference]: Without dead ends: 386 [2022-02-18 16:24:30,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:24:30,498 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 14 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:30,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 12 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:24:30,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-02-18 16:24:30,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2022-02-18 16:24:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 4.176623376623376) internal successors, (1608), 385 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1608 transitions. [2022-02-18 16:24:30,508 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1608 transitions. Word has length 15 [2022-02-18 16:24:30,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:30,508 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1608 transitions. [2022-02-18 16:24:30,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,508 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1608 transitions. [2022-02-18 16:24:30,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-18 16:24:30,509 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:30,509 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:30,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-18 16:24:30,509 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:30,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:30,510 INFO L85 PathProgramCache]: Analyzing trace with hash 181706078, now seen corresponding path program 1 times [2022-02-18 16:24:30,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:30,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971238564] [2022-02-18 16:24:30,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:30,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:30,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:30,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:30,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971238564] [2022-02-18 16:24:30,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971238564] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:30,523 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:30,523 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-18 16:24:30,523 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537172290] [2022-02-18 16:24:30,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:30,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-18 16:24:30,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:30,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-18 16:24:30,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:24:30,524 INFO L87 Difference]: Start difference. First operand 386 states and 1608 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:30,564 INFO L93 Difference]: Finished difference Result 436 states and 1799 transitions. [2022-02-18 16:24:30,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-18 16:24:30,564 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-18 16:24:30,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:30,566 INFO L225 Difference]: With dead ends: 436 [2022-02-18 16:24:30,566 INFO L226 Difference]: Without dead ends: 436 [2022-02-18 16:24:30,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:24:30,567 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:30,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 12 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:24:30,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-02-18 16:24:30,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2022-02-18 16:24:30,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 4.135632183908046) internal successors, (1799), 435 states have internal predecessors, (1799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1799 transitions. [2022-02-18 16:24:30,578 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1799 transitions. Word has length 15 [2022-02-18 16:24:30,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:30,578 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1799 transitions. [2022-02-18 16:24:30,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,578 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1799 transitions. [2022-02-18 16:24:30,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-18 16:24:30,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:30,579 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:30,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-18 16:24:30,580 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:30,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:30,580 INFO L85 PathProgramCache]: Analyzing trace with hash 542072910, now seen corresponding path program 1 times [2022-02-18 16:24:30,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:30,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402598677] [2022-02-18 16:24:30,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:30,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:30,597 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:30,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402598677] [2022-02-18 16:24:30,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402598677] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:30,597 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:30,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-18 16:24:30,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100097512] [2022-02-18 16:24:30,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:30,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-18 16:24:30,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:30,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-18 16:24:30,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:24:30,598 INFO L87 Difference]: Start difference. First operand 436 states and 1799 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:30,639 INFO L93 Difference]: Finished difference Result 493 states and 2014 transitions. [2022-02-18 16:24:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-18 16:24:30,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-02-18 16:24:30,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:30,642 INFO L225 Difference]: With dead ends: 493 [2022-02-18 16:24:30,642 INFO L226 Difference]: Without dead ends: 493 [2022-02-18 16:24:30,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:24:30,643 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:30,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 12 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:24:30,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-02-18 16:24:30,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 493. [2022-02-18 16:24:30,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 4.09349593495935) internal successors, (2014), 492 states have internal predecessors, (2014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 2014 transitions. [2022-02-18 16:24:30,653 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 2014 transitions. Word has length 15 [2022-02-18 16:24:30,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:30,654 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 2014 transitions. [2022-02-18 16:24:30,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,654 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 2014 transitions. [2022-02-18 16:24:30,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:30,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:30,655 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:30,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-18 16:24:30,655 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:30,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:30,655 INFO L85 PathProgramCache]: Analyzing trace with hash -507729471, now seen corresponding path program 1 times [2022-02-18 16:24:30,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:30,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011652032] [2022-02-18 16:24:30,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:30,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:30,671 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:30,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011652032] [2022-02-18 16:24:30,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011652032] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:30,671 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:30,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:24:30,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644563548] [2022-02-18 16:24:30,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:30,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:24:30,671 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:30,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:24:30,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:24:30,672 INFO L87 Difference]: Start difference. First operand 493 states and 2014 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:30,741 INFO L93 Difference]: Finished difference Result 768 states and 2846 transitions. [2022-02-18 16:24:30,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:24:30,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:30,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:30,745 INFO L225 Difference]: With dead ends: 768 [2022-02-18 16:24:30,745 INFO L226 Difference]: Without dead ends: 668 [2022-02-18 16:24:30,745 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 [2022-02-18 16:24:30,746 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:30,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 25 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:30,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-02-18 16:24:30,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 534. [2022-02-18 16:24:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 3.954971857410882) internal successors, (2108), 533 states have internal predecessors, (2108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 2108 transitions. [2022-02-18 16:24:30,759 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 2108 transitions. Word has length 16 [2022-02-18 16:24:30,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:30,759 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 2108 transitions. [2022-02-18 16:24:30,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,759 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 2108 transitions. [2022-02-18 16:24:30,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:30,760 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:30,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:30,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-18 16:24:30,760 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:30,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:30,761 INFO L85 PathProgramCache]: Analyzing trace with hash -263539872, now seen corresponding path program 1 times [2022-02-18 16:24:30,761 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:30,761 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449094134] [2022-02-18 16:24:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:30,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:30,784 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:30,784 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449094134] [2022-02-18 16:24:30,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449094134] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:30,785 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:30,785 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:24:30,785 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244982638] [2022-02-18 16:24:30,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:30,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:24:30,785 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:30,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:24:30,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:24:30,785 INFO L87 Difference]: Start difference. First operand 534 states and 2108 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:30,870 INFO L93 Difference]: Finished difference Result 798 states and 2957 transitions. [2022-02-18 16:24:30,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:24:30,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:30,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:30,873 INFO L225 Difference]: With dead ends: 798 [2022-02-18 16:24:30,873 INFO L226 Difference]: Without dead ends: 698 [2022-02-18 16:24:30,874 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 [2022-02-18 16:24:30,874 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:30,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 25 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:30,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-18 16:24:30,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 542. [2022-02-18 16:24:30,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 3.918669131238447) internal successors, (2120), 541 states have internal predecessors, (2120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 2120 transitions. [2022-02-18 16:24:30,886 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 2120 transitions. Word has length 16 [2022-02-18 16:24:30,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:30,887 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 2120 transitions. [2022-02-18 16:24:30,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:30,887 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 2120 transitions. [2022-02-18 16:24:30,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:30,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:30,888 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:30,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-18 16:24:30,888 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:30,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:30,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1925734427, now seen corresponding path program 1 times [2022-02-18 16:24:30,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:30,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242003702] [2022-02-18 16:24:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:30,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:30,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:30,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242003702] [2022-02-18 16:24:30,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242003702] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:24:30,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260102115] [2022-02-18 16:24:30,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:30,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:24:30,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:24:30,949 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) [2022-02-18 16:24:30,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-18 16:24:30,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:30,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-18 16:24:30,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:24:31,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-18 16:24:31,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-18 16:24:31,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-18 16:24:31,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 121 [2022-02-18 16:24:31,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-18 16:24:31,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 21 [2022-02-18 16:24:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:31,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:24:31,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 255 [2022-02-18 16:24:31,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 239 [2022-02-18 16:24:31,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 51 [2022-02-18 16:24:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:32,041 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260102115] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:24:32,041 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:24:32,041 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-02-18 16:24:32,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092934696] [2022-02-18 16:24:32,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:24:32,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-18 16:24:32,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:32,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-18 16:24:32,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-18 16:24:32,042 INFO L87 Difference]: Start difference. First operand 542 states and 2120 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-02-18 16:24:32,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:32,679 INFO L93 Difference]: Finished difference Result 1568 states and 5231 transitions. [2022-02-18 16:24:32,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-18 16:24:32,680 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 16 [2022-02-18 16:24:32,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:32,686 INFO L225 Difference]: With dead ends: 1568 [2022-02-18 16:24:32,686 INFO L226 Difference]: Without dead ends: 1526 [2022-02-18 16:24:32,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-02-18 16:24:32,688 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 164 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:32,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 105 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:24:32,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2022-02-18 16:24:32,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 556. [2022-02-18 16:24:32,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 3.8954954954954957) internal successors, (2162), 555 states have internal predecessors, (2162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:32,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 2162 transitions. [2022-02-18 16:24:32,709 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 2162 transitions. Word has length 16 [2022-02-18 16:24:32,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:32,709 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 2162 transitions. [2022-02-18 16:24:32,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-02-18 16:24:32,709 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 2162 transitions. [2022-02-18 16:24:32,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:32,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:32,710 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:32,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-18 16:24:32,927 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,SelfDestructingSolverStorable14 [2022-02-18 16:24:32,928 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:32,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:32,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1128101, now seen corresponding path program 1 times [2022-02-18 16:24:32,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:32,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58677613] [2022-02-18 16:24:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:32,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:32,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:32,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:32,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:32,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58677613] [2022-02-18 16:24:32,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58677613] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:24:32,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419352564] [2022-02-18 16:24:32,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:32,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:24:32,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:24:32,950 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) [2022-02-18 16:24:32,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-18 16:24:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:32,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-18 16:24:32,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:24:32,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-18 16:24:33,000 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 26 treesize of output 20 [2022-02-18 16:24:33,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 17 [2022-02-18 16:24:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:33,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:24:33,041 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 20 treesize of output 16 [2022-02-18 16:24:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:33,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419352564] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:24:33,057 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:24:33,057 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-02-18 16:24:33,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432589731] [2022-02-18 16:24:33,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:24:33,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:24:33,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:33,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:24:33,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:24:33,058 INFO L87 Difference]: Start difference. First operand 556 states and 2162 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:33,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:33,128 INFO L93 Difference]: Finished difference Result 806 states and 2889 transitions. [2022-02-18 16:24:33,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:24:33,129 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:33,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:33,132 INFO L225 Difference]: With dead ends: 806 [2022-02-18 16:24:33,132 INFO L226 Difference]: Without dead ends: 717 [2022-02-18 16:24:33,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:33,132 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 38 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:33,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 26 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:33,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-02-18 16:24:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 571. [2022-02-18 16:24:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 3.824561403508772) internal successors, (2180), 570 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 2180 transitions. [2022-02-18 16:24:33,145 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 2180 transitions. Word has length 16 [2022-02-18 16:24:33,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:33,145 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 2180 transitions. [2022-02-18 16:24:33,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:33,145 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 2180 transitions. [2022-02-18 16:24:33,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:33,146 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:33,146 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:33,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-18 16:24:33,365 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,SelfDestructingSolverStorable15 [2022-02-18 16:24:33,366 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:33,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:33,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1488759332, now seen corresponding path program 1 times [2022-02-18 16:24:33,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:33,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543282002] [2022-02-18 16:24:33,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:33,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:33,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:33,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:33,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543282002] [2022-02-18 16:24:33,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543282002] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:33,955 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:33,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-18 16:24:33,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866282906] [2022-02-18 16:24:33,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:33,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-18 16:24:33,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:33,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-18 16:24:33,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-18 16:24:33,956 INFO L87 Difference]: Start difference. First operand 571 states and 2180 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:34,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:34,197 INFO L93 Difference]: Finished difference Result 899 states and 3176 transitions. [2022-02-18 16:24:34,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:34,198 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:34,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:34,201 INFO L225 Difference]: With dead ends: 899 [2022-02-18 16:24:34,201 INFO L226 Difference]: Without dead ends: 857 [2022-02-18 16:24:34,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:24:34,202 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:34,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 32 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:34,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-02-18 16:24:34,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 571. [2022-02-18 16:24:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 3.8175438596491227) internal successors, (2176), 570 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) [2022-02-18 16:24:34,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 2176 transitions. [2022-02-18 16:24:34,216 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 2176 transitions. Word has length 16 [2022-02-18 16:24:34,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:34,216 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 2176 transitions. [2022-02-18 16:24:34,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:34,217 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 2176 transitions. [2022-02-18 16:24:34,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:34,219 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:34,220 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:34,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-18 16:24:34,220 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:34,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:34,220 INFO L85 PathProgramCache]: Analyzing trace with hash 185156828, now seen corresponding path program 1 times [2022-02-18 16:24:34,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:34,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004836916] [2022-02-18 16:24:34,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:34,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:34,268 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:34,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004836916] [2022-02-18 16:24:34,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004836916] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:34,269 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:34,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:24:34,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372702791] [2022-02-18 16:24:34,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:34,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:24:34,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:34,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:24:34,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:24:34,270 INFO L87 Difference]: Start difference. First operand 571 states and 2176 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:34,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:34,352 INFO L93 Difference]: Finished difference Result 832 states and 2998 transitions. [2022-02-18 16:24:34,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:24:34,352 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:34,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:34,356 INFO L225 Difference]: With dead ends: 832 [2022-02-18 16:24:34,356 INFO L226 Difference]: Without dead ends: 743 [2022-02-18 16:24:34,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:34,356 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:34,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 26 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:34,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-02-18 16:24:34,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 563. [2022-02-18 16:24:34,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 3.800711743772242) internal successors, (2136), 562 states have internal predecessors, (2136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 2136 transitions. [2022-02-18 16:24:34,368 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 2136 transitions. Word has length 16 [2022-02-18 16:24:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:34,368 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 2136 transitions. [2022-02-18 16:24:34,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:34,368 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 2136 transitions. [2022-02-18 16:24:34,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:34,369 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:34,369 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:34,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-18 16:24:34,370 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:34,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:34,370 INFO L85 PathProgramCache]: Analyzing trace with hash -372624293, now seen corresponding path program 2 times [2022-02-18 16:24:34,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:34,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451019914] [2022-02-18 16:24:34,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:34,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:34,456 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:34,456 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451019914] [2022-02-18 16:24:34,456 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451019914] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:34,456 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:34,456 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:34,456 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382952562] [2022-02-18 16:24:34,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:34,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:34,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:34,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:34,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:34,458 INFO L87 Difference]: Start difference. First operand 563 states and 2136 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:34,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:34,689 INFO L93 Difference]: Finished difference Result 1040 states and 3637 transitions. [2022-02-18 16:24:34,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-18 16:24:34,689 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:34,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:34,693 INFO L225 Difference]: With dead ends: 1040 [2022-02-18 16:24:34,694 INFO L226 Difference]: Without dead ends: 1017 [2022-02-18 16:24:34,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-18 16:24:34,694 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 70 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:34,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 33 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:34,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-02-18 16:24:34,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 567. [2022-02-18 16:24:34,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 3.7879858657243815) internal successors, (2144), 566 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:34,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 2144 transitions. [2022-02-18 16:24:34,708 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 2144 transitions. Word has length 16 [2022-02-18 16:24:34,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:34,709 INFO L470 AbstractCegarLoop]: Abstraction has 567 states and 2144 transitions. [2022-02-18 16:24:34,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:34,709 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 2144 transitions. [2022-02-18 16:24:34,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:34,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:34,710 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:34,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-18 16:24:34,710 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:34,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:34,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1214418020, now seen corresponding path program 2 times [2022-02-18 16:24:34,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:34,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711670127] [2022-02-18 16:24:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:34,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:34,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:34,979 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:34,979 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711670127] [2022-02-18 16:24:34,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711670127] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:34,979 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:34,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:34,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055709585] [2022-02-18 16:24:34,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:34,980 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:34,980 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:34,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:34,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:34,980 INFO L87 Difference]: Start difference. First operand 567 states and 2144 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:35,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:35,411 INFO L93 Difference]: Finished difference Result 1080 states and 3807 transitions. [2022-02-18 16:24:35,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-18 16:24:35,412 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:35,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:35,426 INFO L225 Difference]: With dead ends: 1080 [2022-02-18 16:24:35,426 INFO L226 Difference]: Without dead ends: 1053 [2022-02-18 16:24:35,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:24:35,427 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:35,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 33 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 16:24:35,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1053 states. [2022-02-18 16:24:35,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1053 to 563. [2022-02-18 16:24:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 3.797153024911032) internal successors, (2134), 562 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:35,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 2134 transitions. [2022-02-18 16:24:35,445 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 2134 transitions. Word has length 16 [2022-02-18 16:24:35,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:35,446 INFO L470 AbstractCegarLoop]: Abstraction has 563 states and 2134 transitions. [2022-02-18 16:24:35,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:35,446 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 2134 transitions. [2022-02-18 16:24:35,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:35,447 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:35,447 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:35,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-18 16:24:35,447 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:35,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:35,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1894650075, now seen corresponding path program 2 times [2022-02-18 16:24:35,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:35,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900148980] [2022-02-18 16:24:35,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:35,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:35,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:35,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:35,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:35,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900148980] [2022-02-18 16:24:35,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900148980] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:24:35,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203630923] [2022-02-18 16:24:35,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:24:35,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:24:35,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:24:35,495 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) [2022-02-18 16:24:35,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-18 16:24:35,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-02-18 16:24:35,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:24:35,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-18 16:24:35,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:24:35,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-02-18 16:24:35,588 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 20 treesize of output 16 [2022-02-18 16:24:35,591 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 [2022-02-18 16:24:35,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-18 16:24:35,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-02-18 16:24:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:35,635 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-18 16:24:35,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203630923] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:35,635 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-18 16:24:35,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 5 [2022-02-18 16:24:35,637 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071504967] [2022-02-18 16:24:35,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:35,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:24:35,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:35,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:24:35,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:35,638 INFO L87 Difference]: Start difference. First operand 563 states and 2134 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:35,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:35,708 INFO L93 Difference]: Finished difference Result 846 states and 3049 transitions. [2022-02-18 16:24:35,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:24:35,708 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:35,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:35,710 INFO L225 Difference]: With dead ends: 846 [2022-02-18 16:24:35,711 INFO L226 Difference]: Without dead ends: 757 [2022-02-18 16:24:35,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:35,711 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:35,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 19 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:35,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 757 states. [2022-02-18 16:24:35,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 757 to 594. [2022-02-18 16:24:35,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 3.75716694772344) internal successors, (2228), 593 states have internal predecessors, (2228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:35,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 2228 transitions. [2022-02-18 16:24:35,722 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 2228 transitions. Word has length 16 [2022-02-18 16:24:35,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:35,722 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 2228 transitions. [2022-02-18 16:24:35,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:35,722 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 2228 transitions. [2022-02-18 16:24:35,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:35,724 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:35,724 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:35,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-18 16:24:35,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:24:35,939 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:35,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1453708196, now seen corresponding path program 2 times [2022-02-18 16:24:35,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:35,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975209756] [2022-02-18 16:24:35,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:35,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:36,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:36,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975209756] [2022-02-18 16:24:36,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975209756] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:36,070 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:36,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-18 16:24:36,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72306508] [2022-02-18 16:24:36,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:36,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-18 16:24:36,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:36,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-18 16:24:36,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-18 16:24:36,071 INFO L87 Difference]: Start difference. First operand 594 states and 2228 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:36,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:36,306 INFO L93 Difference]: Finished difference Result 1386 states and 4875 transitions. [2022-02-18 16:24:36,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-18 16:24:36,306 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:36,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:36,310 INFO L225 Difference]: With dead ends: 1386 [2022-02-18 16:24:36,310 INFO L226 Difference]: Without dead ends: 1257 [2022-02-18 16:24:36,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-18 16:24:36,310 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:36,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 42 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 16:24:36,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-02-18 16:24:36,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 583. [2022-02-18 16:24:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.7353951890034365) internal successors, (2174), 582 states have internal predecessors, (2174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:36,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 2174 transitions. [2022-02-18 16:24:36,324 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 2174 transitions. Word has length 16 [2022-02-18 16:24:36,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:36,325 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 2174 transitions. [2022-02-18 16:24:36,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:36,325 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 2174 transitions. [2022-02-18 16:24:36,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:36,326 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:36,326 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:36,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-18 16:24:36,326 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:36,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:36,326 INFO L85 PathProgramCache]: Analyzing trace with hash 752572181, now seen corresponding path program 3 times [2022-02-18 16:24:36,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:36,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334637236] [2022-02-18 16:24:36,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:36,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:36,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:36,419 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:36,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334637236] [2022-02-18 16:24:36,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334637236] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:24:36,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235562443] [2022-02-18 16:24:36,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:24:36,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:24:36,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:24:36,420 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) [2022-02-18 16:24:36,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-18 16:24:36,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-18 16:24:36,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:24:36,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-18 16:24:36,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:24:36,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 246 [2022-02-18 16:24:36,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 230 [2022-02-18 16:24:36,553 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-18 16:24:36,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 23 [2022-02-18 16:24:36,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:36,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:24:36,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 255 [2022-02-18 16:24:36,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 239 [2022-02-18 16:24:37,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 255 [2022-02-18 16:24:37,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 251 [2022-02-18 16:24:37,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 251 treesize of output 235 [2022-02-18 16:24:37,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 248 [2022-02-18 16:24:37,138 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 213 treesize of output 197 [2022-02-18 16:24:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:37,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235562443] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:24:37,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:24:37,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-02-18 16:24:37,278 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233921377] [2022-02-18 16:24:37,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:24:37,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-18 16:24:37,278 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:37,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-18 16:24:37,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-18 16:24:37,278 INFO L87 Difference]: Start difference. First operand 583 states and 2174 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:37,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:37,592 INFO L93 Difference]: Finished difference Result 1113 states and 3719 transitions. [2022-02-18 16:24:37,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-18 16:24:37,593 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:37,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:37,595 INFO L225 Difference]: With dead ends: 1113 [2022-02-18 16:24:37,595 INFO L226 Difference]: Without dead ends: 1071 [2022-02-18 16:24:37,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-02-18 16:24:37,596 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 135 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:37,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 65 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 16:24:37,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2022-02-18 16:24:37,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 583. [2022-02-18 16:24:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.7199312714776633) internal successors, (2165), 582 states have internal predecessors, (2165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:37,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 2165 transitions. [2022-02-18 16:24:37,609 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 2165 transitions. Word has length 16 [2022-02-18 16:24:37,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:37,609 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 2165 transitions. [2022-02-18 16:24:37,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:37,609 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 2165 transitions. [2022-02-18 16:24:37,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:37,610 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:37,611 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:37,627 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-18 16:24:37,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:24:37,823 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:37,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:37,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1793091819, now seen corresponding path program 4 times [2022-02-18 16:24:37,824 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:37,824 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452600795] [2022-02-18 16:24:37,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:37,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:37,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:37,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452600795] [2022-02-18 16:24:37,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452600795] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:24:37,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328521699] [2022-02-18 16:24:37,889 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:24:37,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:24:37,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:24:37,890 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) [2022-02-18 16:24:37,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-18 16:24:37,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:24:37,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:24:37,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-18 16:24:37,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:24:37,938 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 35 treesize of output 27 [2022-02-18 16:24:37,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 246 [2022-02-18 16:24:38,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 242 [2022-02-18 16:24:38,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 271 treesize of output 241 [2022-02-18 16:24:38,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 250 treesize of output 234 [2022-02-18 16:24:38,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 217 [2022-02-18 16:24:38,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 202 treesize of output 186 [2022-02-18 16:24:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:38,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:24:38,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 255 [2022-02-18 16:24:38,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 239 [2022-02-18 16:24:38,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 255 [2022-02-18 16:24:38,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 251 [2022-02-18 16:24:38,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 251 treesize of output 235 [2022-02-18 16:24:38,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 248 [2022-02-18 16:24:38,569 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 213 treesize of output 197 [2022-02-18 16:24:38,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:38,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328521699] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:24:38,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:24:38,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-02-18 16:24:38,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533213106] [2022-02-18 16:24:38,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:24:38,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-18 16:24:38,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:38,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-18 16:24:38,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-18 16:24:38,682 INFO L87 Difference]: Start difference. First operand 583 states and 2165 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:39,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:39,008 INFO L93 Difference]: Finished difference Result 1130 states and 3748 transitions. [2022-02-18 16:24:39,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-18 16:24:39,009 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:39,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:39,011 INFO L225 Difference]: With dead ends: 1130 [2022-02-18 16:24:39,011 INFO L226 Difference]: Without dead ends: 1097 [2022-02-18 16:24:39,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2022-02-18 16:24:39,012 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 74 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:39,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 93 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 16:24:39,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1097 states. [2022-02-18 16:24:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1097 to 583. [2022-02-18 16:24:39,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.711340206185567) internal successors, (2160), 582 states have internal predecessors, (2160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:39,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 2160 transitions. [2022-02-18 16:24:39,024 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 2160 transitions. Word has length 16 [2022-02-18 16:24:39,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:39,025 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 2160 transitions. [2022-02-18 16:24:39,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:39,025 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 2160 transitions. [2022-02-18 16:24:39,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:39,026 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:39,026 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:39,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-18 16:24:39,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-02-18 16:24:39,239 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:39,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:39,240 INFO L85 PathProgramCache]: Analyzing trace with hash 2014690456, now seen corresponding path program 3 times [2022-02-18 16:24:39,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:39,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835260320] [2022-02-18 16:24:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:39,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:39,457 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:39,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835260320] [2022-02-18 16:24:39,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835260320] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:39,458 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:39,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:39,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951645098] [2022-02-18 16:24:39,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:39,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:39,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:39,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:39,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:39,458 INFO L87 Difference]: Start difference. First operand 583 states and 2160 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:39,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:39,821 INFO L93 Difference]: Finished difference Result 659 states and 2144 transitions. [2022-02-18 16:24:39,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:39,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:39,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:39,823 INFO L225 Difference]: With dead ends: 659 [2022-02-18 16:24:39,823 INFO L226 Difference]: Without dead ends: 617 [2022-02-18 16:24:39,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:24:39,823 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 42 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:39,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 33 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:39,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-02-18 16:24:39,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 515. [2022-02-18 16:24:39,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 3.490272373540856) internal successors, (1794), 514 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:39,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1794 transitions. [2022-02-18 16:24:39,838 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1794 transitions. Word has length 16 [2022-02-18 16:24:39,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:39,839 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1794 transitions. [2022-02-18 16:24:39,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:39,839 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1794 transitions. [2022-02-18 16:24:39,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:39,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:39,841 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:39,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-18 16:24:39,841 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:39,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:39,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1307197526, now seen corresponding path program 4 times [2022-02-18 16:24:39,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:39,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046090397] [2022-02-18 16:24:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:39,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:40,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:40,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046090397] [2022-02-18 16:24:40,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046090397] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:40,014 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:40,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:40,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27275390] [2022-02-18 16:24:40,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:40,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:40,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:40,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:40,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:40,015 INFO L87 Difference]: Start difference. First operand 515 states and 1794 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:40,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:40,296 INFO L93 Difference]: Finished difference Result 648 states and 2118 transitions. [2022-02-18 16:24:40,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:40,296 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:40,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:40,298 INFO L225 Difference]: With dead ends: 648 [2022-02-18 16:24:40,298 INFO L226 Difference]: Without dead ends: 625 [2022-02-18 16:24:40,298 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:24:40,298 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:40,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 39 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:40,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-02-18 16:24:40,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 525. [2022-02-18 16:24:40,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 524 states have (on average 3.4713740458015265) internal successors, (1819), 524 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) [2022-02-18 16:24:40,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 1819 transitions. [2022-02-18 16:24:40,307 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 1819 transitions. Word has length 16 [2022-02-18 16:24:40,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:40,307 INFO L470 AbstractCegarLoop]: Abstraction has 525 states and 1819 transitions. [2022-02-18 16:24:40,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:40,308 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 1819 transitions. [2022-02-18 16:24:40,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:40,309 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:40,309 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:40,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-18 16:24:40,309 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:40,309 INFO L85 PathProgramCache]: Analyzing trace with hash -2035538601, now seen corresponding path program 2 times [2022-02-18 16:24:40,309 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:40,309 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128377028] [2022-02-18 16:24:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:40,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:40,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:40,348 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:40,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128377028] [2022-02-18 16:24:40,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128377028] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:24:40,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414733444] [2022-02-18 16:24:40,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:24:40,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:24:40,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:24:40,349 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) [2022-02-18 16:24:40,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-18 16:24:40,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-02-18 16:24:40,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:24:40,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-18 16:24:40,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:24:40,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-18 16:24:40,448 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-18 16:24:40,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-18 16:24:40,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 121 [2022-02-18 16:24:40,645 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 18 treesize of output 14 [2022-02-18 16:24:40,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 13 [2022-02-18 16:24:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:40,657 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-18 16:24:40,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414733444] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:40,657 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-18 16:24:40,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-02-18 16:24:40,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157655913] [2022-02-18 16:24:40,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:40,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:40,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:40,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:40,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:24:40,658 INFO L87 Difference]: Start difference. First operand 525 states and 1819 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:40,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:40,760 INFO L93 Difference]: Finished difference Result 592 states and 1956 transitions. [2022-02-18 16:24:40,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:24:40,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:40,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:40,762 INFO L225 Difference]: With dead ends: 592 [2022-02-18 16:24:40,762 INFO L226 Difference]: Without dead ends: 544 [2022-02-18 16:24:40,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-18 16:24:40,762 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:40,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 18 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:40,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-02-18 16:24:40,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 509. [2022-02-18 16:24:40,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 3.47244094488189) internal successors, (1764), 508 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:40,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1764 transitions. [2022-02-18 16:24:40,771 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1764 transitions. Word has length 16 [2022-02-18 16:24:40,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:40,771 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 1764 transitions. [2022-02-18 16:24:40,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:40,771 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1764 transitions. [2022-02-18 16:24:40,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:40,772 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:40,772 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:40,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-18 16:24:40,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-02-18 16:24:40,988 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:40,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:40,988 INFO L85 PathProgramCache]: Analyzing trace with hash -861432262, now seen corresponding path program 2 times [2022-02-18 16:24:40,988 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:40,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673977321] [2022-02-18 16:24:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:40,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:41,068 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:41,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673977321] [2022-02-18 16:24:41,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673977321] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:41,068 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:41,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:41,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718822755] [2022-02-18 16:24:41,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:41,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:41,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:41,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:41,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:41,069 INFO L87 Difference]: Start difference. First operand 509 states and 1764 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:41,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:41,217 INFO L93 Difference]: Finished difference Result 684 states and 2276 transitions. [2022-02-18 16:24:41,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:24:41,217 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:41,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:41,219 INFO L225 Difference]: With dead ends: 684 [2022-02-18 16:24:41,219 INFO L226 Difference]: Without dead ends: 623 [2022-02-18 16:24:41,219 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-18 16:24:41,219 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 34 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:41,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 29 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:41,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-02-18 16:24:41,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 479. [2022-02-18 16:24:41,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 3.510460251046025) internal successors, (1678), 478 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:41,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1678 transitions. [2022-02-18 16:24:41,227 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1678 transitions. Word has length 16 [2022-02-18 16:24:41,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:41,227 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1678 transitions. [2022-02-18 16:24:41,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:41,227 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1678 transitions. [2022-02-18 16:24:41,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:41,230 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:41,230 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:41,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-18 16:24:41,231 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:41,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:41,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1639640981, now seen corresponding path program 5 times [2022-02-18 16:24:41,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:41,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499058872] [2022-02-18 16:24:41,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:41,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:41,327 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:41,327 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499058872] [2022-02-18 16:24:41,327 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499058872] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:41,327 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:41,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-18 16:24:41,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560027990] [2022-02-18 16:24:41,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:41,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-18 16:24:41,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:41,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-18 16:24:41,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-18 16:24:41,328 INFO L87 Difference]: Start difference. First operand 479 states and 1678 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:41,590 INFO L93 Difference]: Finished difference Result 851 states and 2791 transitions. [2022-02-18 16:24:41,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-18 16:24:41,590 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:41,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:41,592 INFO L225 Difference]: With dead ends: 851 [2022-02-18 16:24:41,592 INFO L226 Difference]: Without dead ends: 828 [2022-02-18 16:24:41,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-18 16:24:41,592 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:41,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 31 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-02-18 16:24:41,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 485. [2022-02-18 16:24:41,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.506198347107438) internal successors, (1697), 484 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:41,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1697 transitions. [2022-02-18 16:24:41,605 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1697 transitions. Word has length 16 [2022-02-18 16:24:41,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:41,605 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1697 transitions. [2022-02-18 16:24:41,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:41,605 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1697 transitions. [2022-02-18 16:24:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:41,606 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:41,606 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:41,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-18 16:24:41,606 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:41,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:41,607 INFO L85 PathProgramCache]: Analyzing trace with hash 797847254, now seen corresponding path program 5 times [2022-02-18 16:24:41,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:41,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551092706] [2022-02-18 16:24:41,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:41,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:41,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:41,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:41,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551092706] [2022-02-18 16:24:41,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551092706] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:41,828 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:41,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:41,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670020758] [2022-02-18 16:24:41,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:41,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:41,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:41,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:41,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:41,829 INFO L87 Difference]: Start difference. First operand 485 states and 1697 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:42,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:42,207 INFO L93 Difference]: Finished difference Result 934 states and 3145 transitions. [2022-02-18 16:24:42,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-18 16:24:42,207 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:42,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:42,209 INFO L225 Difference]: With dead ends: 934 [2022-02-18 16:24:42,209 INFO L226 Difference]: Without dead ends: 907 [2022-02-18 16:24:42,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:24:42,210 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 60 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:42,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 27 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-18 16:24:42,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2022-02-18 16:24:42,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 481. [2022-02-18 16:24:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.5145833333333334) internal successors, (1687), 480 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:42,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1687 transitions. [2022-02-18 16:24:42,225 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1687 transitions. Word has length 16 [2022-02-18 16:24:42,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:42,225 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1687 transitions. [2022-02-18 16:24:42,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:42,226 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1687 transitions. [2022-02-18 16:24:42,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:42,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:42,226 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:42,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-18 16:24:42,227 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:42,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:42,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1392335701, now seen corresponding path program 6 times [2022-02-18 16:24:42,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:42,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668599093] [2022-02-18 16:24:42,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:42,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:42,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:42,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:42,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668599093] [2022-02-18 16:24:42,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668599093] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:24:42,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506107924] [2022-02-18 16:24:42,307 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:24:42,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:24:42,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:24:42,308 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) [2022-02-18 16:24:42,324 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-18 16:24:42,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-18 16:24:42,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:24:42,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2022-02-18 16:24:42,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:24:42,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-18 16:24:42,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-02-18 16:24:42,591 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 135 treesize of output 121 [2022-02-18 16:24:42,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 21 [2022-02-18 16:24:42,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 21 [2022-02-18 16:24:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:42,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:24:42,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 259 treesize of output 255 [2022-02-18 16:24:42,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 239 [2022-02-18 16:24:43,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 51 [2022-02-18 16:24:43,106 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:43,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506107924] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:24:43,106 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:24:43,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2022-02-18 16:24:43,106 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833691260] [2022-02-18 16:24:43,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:24:43,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-18 16:24:43,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:43,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-18 16:24:43,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-02-18 16:24:43,107 INFO L87 Difference]: Start difference. First operand 481 states and 1687 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:43,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:43,536 INFO L93 Difference]: Finished difference Result 1133 states and 3561 transitions. [2022-02-18 16:24:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-18 16:24:43,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:43,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:43,552 INFO L225 Difference]: With dead ends: 1133 [2022-02-18 16:24:43,553 INFO L226 Difference]: Without dead ends: 1100 [2022-02-18 16:24:43,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2022-02-18 16:24:43,553 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:43,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 86 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-18 16:24:43,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2022-02-18 16:24:43,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 481. [2022-02-18 16:24:43,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.5) internal successors, (1680), 480 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:43,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1680 transitions. [2022-02-18 16:24:43,565 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1680 transitions. Word has length 16 [2022-02-18 16:24:43,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:43,565 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1680 transitions. [2022-02-18 16:24:43,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:43,565 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1680 transitions. [2022-02-18 16:24:43,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-18 16:24:43,566 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:43,566 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:43,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-18 16:24:43,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:24:43,782 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:43,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:43,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1154290392, now seen corresponding path program 6 times [2022-02-18 16:24:43,783 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:43,783 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268669805] [2022-02-18 16:24:43,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:43,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:44,313 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:44,313 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268669805] [2022-02-18 16:24:44,313 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268669805] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:44,313 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:44,313 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-18 16:24:44,313 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928327094] [2022-02-18 16:24:44,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:44,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-18 16:24:44,313 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:44,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-18 16:24:44,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-18 16:24:44,314 INFO L87 Difference]: Start difference. First operand 481 states and 1680 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:44,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:44,500 INFO L93 Difference]: Finished difference Result 751 states and 2502 transitions. [2022-02-18 16:24:44,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:44,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-02-18 16:24:44,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:44,502 INFO L225 Difference]: With dead ends: 751 [2022-02-18 16:24:44,502 INFO L226 Difference]: Without dead ends: 728 [2022-02-18 16:24:44,502 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-18 16:24:44,502 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:44,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 33 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:44,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-02-18 16:24:44,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 481. [2022-02-18 16:24:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 3.5) internal successors, (1680), 480 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 1680 transitions. [2022-02-18 16:24:44,511 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 1680 transitions. Word has length 16 [2022-02-18 16:24:44,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:44,511 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 1680 transitions. [2022-02-18 16:24:44,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:44,511 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 1680 transitions. [2022-02-18 16:24:44,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:44,512 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:44,512 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:44,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-18 16:24:44,512 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:44,512 INFO L85 PathProgramCache]: Analyzing trace with hash -792567682, now seen corresponding path program 1 times [2022-02-18 16:24:44,513 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:44,513 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709222720] [2022-02-18 16:24:44,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:44,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:44,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:44,535 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:44,535 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709222720] [2022-02-18 16:24:44,535 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709222720] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:44,535 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:44,535 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:24:44,535 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433114832] [2022-02-18 16:24:44,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:44,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:24:44,535 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:44,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:24:44,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:24:44,536 INFO L87 Difference]: Start difference. First operand 481 states and 1680 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:44,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:44,587 INFO L93 Difference]: Finished difference Result 738 states and 2422 transitions. [2022-02-18 16:24:44,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:24:44,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 [2022-02-18 16:24:44,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:44,589 INFO L225 Difference]: With dead ends: 738 [2022-02-18 16:24:44,589 INFO L226 Difference]: Without dead ends: 738 [2022-02-18 16:24:44,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:24:44,590 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:44,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 20 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:24:44,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2022-02-18 16:24:44,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 518. [2022-02-18 16:24:44,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 3.4545454545454546) internal successors, (1786), 517 states have internal predecessors, (1786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:44,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1786 transitions. [2022-02-18 16:24:44,599 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1786 transitions. Word has length 18 [2022-02-18 16:24:44,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:44,599 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 1786 transitions. [2022-02-18 16:24:44,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:44,599 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1786 transitions. [2022-02-18 16:24:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:44,600 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:44,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:44,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-18 16:24:44,600 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:44,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1204040894, now seen corresponding path program 2 times [2022-02-18 16:24:44,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:44,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511440714] [2022-02-18 16:24:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:44,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:44,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 16:24:44,620 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:44,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511440714] [2022-02-18 16:24:44,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511440714] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:44,620 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:44,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:24:44,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319764621] [2022-02-18 16:24:44,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:44,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:24:44,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:44,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:24:44,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:24:44,621 INFO L87 Difference]: Start difference. First operand 518 states and 1786 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:44,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:44,679 INFO L93 Difference]: Finished difference Result 667 states and 2158 transitions. [2022-02-18 16:24:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:24:44,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 [2022-02-18 16:24:44,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:44,681 INFO L225 Difference]: With dead ends: 667 [2022-02-18 16:24:44,681 INFO L226 Difference]: Without dead ends: 659 [2022-02-18 16:24:44,681 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 [2022-02-18 16:24:44,681 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:44,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 27 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:24:44,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-02-18 16:24:44,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 518. [2022-02-18 16:24:44,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 3.4468085106382977) internal successors, (1782), 517 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:44,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 1782 transitions. [2022-02-18 16:24:44,690 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 1782 transitions. Word has length 18 [2022-02-18 16:24:44,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:44,690 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 1782 transitions. [2022-02-18 16:24:44,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:44,690 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 1782 transitions. [2022-02-18 16:24:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:44,691 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:44,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:44,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-18 16:24:44,691 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1945402973, now seen corresponding path program 1 times [2022-02-18 16:24:44,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:44,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746180884] [2022-02-18 16:24:44,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:44,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:44,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 16:24:44,700 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:44,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746180884] [2022-02-18 16:24:44,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746180884] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:44,701 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:44,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-18 16:24:44,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329237743] [2022-02-18 16:24:44,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:44,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-18 16:24:44,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:44,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-18 16:24:44,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:24:44,701 INFO L87 Difference]: Start difference. First operand 518 states and 1782 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-02-18 16:24:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:44,735 INFO L93 Difference]: Finished difference Result 511 states and 1636 transitions. [2022-02-18 16:24:44,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-18 16:24:44,735 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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 [2022-02-18 16:24:44,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:44,736 INFO L225 Difference]: With dead ends: 511 [2022-02-18 16:24:44,736 INFO L226 Difference]: Without dead ends: 495 [2022-02-18 16:24:44,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-18 16:24:44,736 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:44,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 13 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:24:44,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-02-18 16:24:44,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 464. [2022-02-18 16:24:44,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 3.311015118790497) internal successors, (1533), 463 states have internal predecessors, (1533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:44,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 1533 transitions. [2022-02-18 16:24:44,744 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 1533 transitions. Word has length 18 [2022-02-18 16:24:44,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:44,744 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 1533 transitions. [2022-02-18 16:24:44,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 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) [2022-02-18 16:24:44,745 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 1533 transitions. [2022-02-18 16:24:44,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:44,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:44,745 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:44,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-18 16:24:44,746 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:44,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:44,746 INFO L85 PathProgramCache]: Analyzing trace with hash -1469090786, now seen corresponding path program 1 times [2022-02-18 16:24:44,746 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:44,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363143465] [2022-02-18 16:24:44,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:44,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:44,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:44,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 16:24:44,850 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:44,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363143465] [2022-02-18 16:24:44,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363143465] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:44,851 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:44,851 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:44,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302716754] [2022-02-18 16:24:44,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:44,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:44,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:44,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:44,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:44,851 INFO L87 Difference]: Start difference. First operand 464 states and 1533 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-18 16:24:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:44,929 INFO L93 Difference]: Finished difference Result 592 states and 1794 transitions. [2022-02-18 16:24:44,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:44,929 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2022-02-18 16:24:44,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:44,930 INFO L225 Difference]: With dead ends: 592 [2022-02-18 16:24:44,930 INFO L226 Difference]: Without dead ends: 592 [2022-02-18 16:24:44,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:44,931 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 58 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:44,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 31 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:44,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-02-18 16:24:44,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 447. [2022-02-18 16:24:44,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 3.208520179372197) internal successors, (1431), 446 states have internal predecessors, (1431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:44,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1431 transitions. [2022-02-18 16:24:44,941 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1431 transitions. Word has length 18 [2022-02-18 16:24:44,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:44,941 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 1431 transitions. [2022-02-18 16:24:44,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-18 16:24:44,941 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1431 transitions. [2022-02-18 16:24:44,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:44,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:44,942 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:44,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-18 16:24:44,942 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:44,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1194749474, now seen corresponding path program 2 times [2022-02-18 16:24:44,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:44,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217717891] [2022-02-18 16:24:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:44,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 16:24:44,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:44,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217717891] [2022-02-18 16:24:44,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217717891] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:44,980 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:44,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:24:44,980 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962108434] [2022-02-18 16:24:44,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:44,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:24:44,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:44,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:24:44,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:24:44,982 INFO L87 Difference]: Start difference. First operand 447 states and 1431 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:45,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:45,068 INFO L93 Difference]: Finished difference Result 580 states and 1726 transitions. [2022-02-18 16:24:45,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:45,068 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 [2022-02-18 16:24:45,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:45,069 INFO L225 Difference]: With dead ends: 580 [2022-02-18 16:24:45,069 INFO L226 Difference]: Without dead ends: 572 [2022-02-18 16:24:45,069 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 [2022-02-18 16:24:45,069 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 40 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:45,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 30 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-02-18 16:24:45,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 447. [2022-02-18 16:24:45,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 3.1995515695067263) internal successors, (1427), 446 states have internal predecessors, (1427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:45,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1427 transitions. [2022-02-18 16:24:45,077 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1427 transitions. Word has length 18 [2022-02-18 16:24:45,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:45,077 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 1427 transitions. [2022-02-18 16:24:45,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:45,077 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1427 transitions. [2022-02-18 16:24:45,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:45,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:45,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:45,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-18 16:24:45,079 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:45,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:45,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1421291112, now seen corresponding path program 1 times [2022-02-18 16:24:45,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:45,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372909304] [2022-02-18 16:24:45,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:45,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:45,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:45,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:45,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372909304] [2022-02-18 16:24:45,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372909304] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:45,094 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:45,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:24:45,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963326285] [2022-02-18 16:24:45,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:45,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:24:45,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:45,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:24:45,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:24:45,095 INFO L87 Difference]: Start difference. First operand 447 states and 1427 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:45,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:45,148 INFO L93 Difference]: Finished difference Result 510 states and 1570 transitions. [2022-02-18 16:24:45,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:24:45,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 [2022-02-18 16:24:45,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:45,149 INFO L225 Difference]: With dead ends: 510 [2022-02-18 16:24:45,149 INFO L226 Difference]: Without dead ends: 502 [2022-02-18 16:24:45,149 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 [2022-02-18 16:24:45,149 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:45,149 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 21 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:24:45,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-02-18 16:24:45,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 447. [2022-02-18 16:24:45,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 3.195067264573991) internal successors, (1425), 446 states have internal predecessors, (1425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:45,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1425 transitions. [2022-02-18 16:24:45,176 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1425 transitions. Word has length 18 [2022-02-18 16:24:45,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:45,176 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 1425 transitions. [2022-02-18 16:24:45,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:45,176 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1425 transitions. [2022-02-18 16:24:45,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:45,176 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:45,177 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:45,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-18 16:24:45,177 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:45,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:45,178 INFO L85 PathProgramCache]: Analyzing trace with hash 506049626, now seen corresponding path program 1 times [2022-02-18 16:24:45,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:45,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268568319] [2022-02-18 16:24:45,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:45,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 16:24:45,254 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:45,254 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268568319] [2022-02-18 16:24:45,254 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268568319] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:45,254 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:45,254 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:45,254 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995896040] [2022-02-18 16:24:45,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:45,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:45,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:45,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:45,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:45,255 INFO L87 Difference]: Start difference. First operand 447 states and 1425 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-18 16:24:45,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:45,353 INFO L93 Difference]: Finished difference Result 535 states and 1614 transitions. [2022-02-18 16:24:45,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:45,354 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2022-02-18 16:24:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:45,354 INFO L225 Difference]: With dead ends: 535 [2022-02-18 16:24:45,355 INFO L226 Difference]: Without dead ends: 523 [2022-02-18 16:24:45,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-02-18 16:24:45,355 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 52 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:45,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 29 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:45,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-02-18 16:24:45,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 443. [2022-02-18 16:24:45,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 3.2058823529411766) internal successors, (1417), 442 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:45,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 1417 transitions. [2022-02-18 16:24:45,363 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 1417 transitions. Word has length 18 [2022-02-18 16:24:45,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:45,363 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 1417 transitions. [2022-02-18 16:24:45,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-18 16:24:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 1417 transitions. [2022-02-18 16:24:45,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:45,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:45,364 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:45,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-18 16:24:45,364 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:45,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:45,364 INFO L85 PathProgramCache]: Analyzing trace with hash 730277714, now seen corresponding path program 3 times [2022-02-18 16:24:45,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:45,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715176322] [2022-02-18 16:24:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:45,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:45,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:45,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715176322] [2022-02-18 16:24:45,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715176322] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:45,387 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:45,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:24:45,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992312228] [2022-02-18 16:24:45,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:45,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:24:45,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:45,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:24:45,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:24:45,388 INFO L87 Difference]: Start difference. First operand 443 states and 1417 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:45,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:45,449 INFO L93 Difference]: Finished difference Result 567 states and 1733 transitions. [2022-02-18 16:24:45,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:24:45,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 [2022-02-18 16:24:45,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:45,450 INFO L225 Difference]: With dead ends: 567 [2022-02-18 16:24:45,450 INFO L226 Difference]: Without dead ends: 567 [2022-02-18 16:24:45,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:24:45,451 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 24 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 [2022-02-18 16:24:45,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 24 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:45,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-02-18 16:24:45,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 426. [2022-02-18 16:24:45,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.1670588235294117) internal successors, (1346), 425 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:45,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1346 transitions. [2022-02-18 16:24:45,458 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1346 transitions. Word has length 18 [2022-02-18 16:24:45,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:45,458 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1346 transitions. [2022-02-18 16:24:45,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:45,458 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1346 transitions. [2022-02-18 16:24:45,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:45,459 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:45,459 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:45,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-18 16:24:45,459 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:45,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:45,459 INFO L85 PathProgramCache]: Analyzing trace with hash -2067631598, now seen corresponding path program 2 times [2022-02-18 16:24:45,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:45,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901994401] [2022-02-18 16:24:45,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:45,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-02-18 16:24:45,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:45,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901994401] [2022-02-18 16:24:45,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901994401] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:45,475 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:45,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:24:45,475 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481022192] [2022-02-18 16:24:45,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:45,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:24:45,475 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:45,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:24:45,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:24:45,476 INFO L87 Difference]: Start difference. First operand 426 states and 1346 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:45,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:45,527 INFO L93 Difference]: Finished difference Result 534 states and 1595 transitions. [2022-02-18 16:24:45,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:24:45,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 [2022-02-18 16:24:45,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:45,528 INFO L225 Difference]: With dead ends: 534 [2022-02-18 16:24:45,528 INFO L226 Difference]: Without dead ends: 526 [2022-02-18 16:24:45,528 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 [2022-02-18 16:24:45,529 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 32 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:45,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 25 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:24:45,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-02-18 16:24:45,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 426. [2022-02-18 16:24:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 425 states have (on average 3.1576470588235295) internal successors, (1342), 425 states have internal predecessors, (1342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 1342 transitions. [2022-02-18 16:24:45,536 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 1342 transitions. Word has length 18 [2022-02-18 16:24:45,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:45,536 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 1342 transitions. [2022-02-18 16:24:45,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:45,536 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 1342 transitions. [2022-02-18 16:24:45,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:45,537 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:45,537 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:45,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-18 16:24:45,537 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:45,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:45,537 INFO L85 PathProgramCache]: Analyzing trace with hash 790162898, now seen corresponding path program 3 times [2022-02-18 16:24:45,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:45,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774540031] [2022-02-18 16:24:45,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:45,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:45,555 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:45,555 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774540031] [2022-02-18 16:24:45,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774540031] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:45,555 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:45,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:24:45,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328391583] [2022-02-18 16:24:45,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:45,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:24:45,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:45,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:24:45,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:24:45,556 INFO L87 Difference]: Start difference. First operand 426 states and 1342 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:45,610 INFO L93 Difference]: Finished difference Result 488 states and 1478 transitions. [2022-02-18 16:24:45,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:45,610 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 [2022-02-18 16:24:45,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:45,611 INFO L225 Difference]: With dead ends: 488 [2022-02-18 16:24:45,611 INFO L226 Difference]: Without dead ends: 488 [2022-02-18 16:24:45,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:45,611 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:45,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 26 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:24:45,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-02-18 16:24:45,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 406. [2022-02-18 16:24:45,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.1160493827160494) internal successors, (1262), 405 states have internal predecessors, (1262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1262 transitions. [2022-02-18 16:24:45,617 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1262 transitions. Word has length 18 [2022-02-18 16:24:45,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:45,617 INFO L470 AbstractCegarLoop]: Abstraction has 406 states and 1262 transitions. [2022-02-18 16:24:45,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1262 transitions. [2022-02-18 16:24:45,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:45,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:45,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:45,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-18 16:24:45,618 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:45,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:45,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1844012472, now seen corresponding path program 3 times [2022-02-18 16:24:45,619 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:45,619 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460641658] [2022-02-18 16:24:45,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:45,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 16:24:45,701 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:45,701 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460641658] [2022-02-18 16:24:45,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460641658] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:45,701 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:45,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:45,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043964391] [2022-02-18 16:24:45,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:45,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:45,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:45,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:45,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:45,701 INFO L87 Difference]: Start difference. First operand 406 states and 1262 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-18 16:24:45,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:45,778 INFO L93 Difference]: Finished difference Result 492 states and 1441 transitions. [2022-02-18 16:24:45,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:45,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2022-02-18 16:24:45,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:45,779 INFO L225 Difference]: With dead ends: 492 [2022-02-18 16:24:45,779 INFO L226 Difference]: Without dead ends: 492 [2022-02-18 16:24:45,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:45,780 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:45,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 29 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:45,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-02-18 16:24:45,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 369. [2022-02-18 16:24:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 3.073369565217391) internal successors, (1131), 368 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:45,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 1131 transitions. [2022-02-18 16:24:45,786 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 1131 transitions. Word has length 18 [2022-02-18 16:24:45,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:45,786 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 1131 transitions. [2022-02-18 16:24:45,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-18 16:24:45,786 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 1131 transitions. [2022-02-18 16:24:45,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:45,787 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:45,787 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:45,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-18 16:24:45,787 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:45,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:45,787 INFO L85 PathProgramCache]: Analyzing trace with hash -197121620, now seen corresponding path program 2 times [2022-02-18 16:24:45,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:45,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914413545] [2022-02-18 16:24:45,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:45,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:45,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 16:24:45,840 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:45,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914413545] [2022-02-18 16:24:45,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914413545] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:45,840 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:45,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:24:45,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520569034] [2022-02-18 16:24:45,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:45,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:24:45,841 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:45,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:24:45,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:24:45,841 INFO L87 Difference]: Start difference. First operand 369 states and 1131 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:45,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:45,944 INFO L93 Difference]: Finished difference Result 477 states and 1396 transitions. [2022-02-18 16:24:45,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:45,944 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 [2022-02-18 16:24:45,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:45,945 INFO L225 Difference]: With dead ends: 477 [2022-02-18 16:24:45,945 INFO L226 Difference]: Without dead ends: 477 [2022-02-18 16:24:45,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:45,946 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:45,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 27 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:45,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2022-02-18 16:24:45,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 379. [2022-02-18 16:24:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.0846560846560847) internal successors, (1166), 378 states have internal predecessors, (1166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:45,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1166 transitions. [2022-02-18 16:24:45,953 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1166 transitions. Word has length 18 [2022-02-18 16:24:45,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:45,953 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1166 transitions. [2022-02-18 16:24:45,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:45,953 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1166 transitions. [2022-02-18 16:24:45,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:45,954 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:45,954 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:45,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-18 16:24:45,954 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:45,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:45,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1810562742, now seen corresponding path program 4 times [2022-02-18 16:24:45,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:45,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363764165] [2022-02-18 16:24:45,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:45,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:45,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 16:24:46,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:46,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363764165] [2022-02-18 16:24:46,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363764165] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:46,002 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:46,002 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:24:46,002 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206838150] [2022-02-18 16:24:46,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:46,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:24:46,003 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:46,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:24:46,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:24:46,003 INFO L87 Difference]: Start difference. First operand 379 states and 1166 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:46,090 INFO L93 Difference]: Finished difference Result 406 states and 1207 transitions. [2022-02-18 16:24:46,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:46,090 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 [2022-02-18 16:24:46,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:46,091 INFO L225 Difference]: With dead ends: 406 [2022-02-18 16:24:46,091 INFO L226 Difference]: Without dead ends: 396 [2022-02-18 16:24:46,091 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 [2022-02-18 16:24:46,091 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:46,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 27 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:46,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-02-18 16:24:46,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 379. [2022-02-18 16:24:46,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.0714285714285716) internal successors, (1161), 378 states have internal predecessors, (1161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:46,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1161 transitions. [2022-02-18 16:24:46,097 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1161 transitions. Word has length 18 [2022-02-18 16:24:46,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:46,097 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1161 transitions. [2022-02-18 16:24:46,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:46,097 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1161 transitions. [2022-02-18 16:24:46,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:46,098 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:46,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:46,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-18 16:24:46,098 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:46,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:46,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1939653548, now seen corresponding path program 3 times [2022-02-18 16:24:46,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:46,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861725893] [2022-02-18 16:24:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:46,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:46,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 16:24:46,141 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:46,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861725893] [2022-02-18 16:24:46,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861725893] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:46,141 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:46,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-18 16:24:46,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062841919] [2022-02-18 16:24:46,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:46,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-18 16:24:46,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:46,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-18 16:24:46,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-18 16:24:46,142 INFO L87 Difference]: Start difference. First operand 379 states and 1161 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:46,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:46,231 INFO L93 Difference]: Finished difference Result 514 states and 1461 transitions. [2022-02-18 16:24:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:46,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 [2022-02-18 16:24:46,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:46,232 INFO L225 Difference]: With dead ends: 514 [2022-02-18 16:24:46,233 INFO L226 Difference]: Without dead ends: 506 [2022-02-18 16:24:46,233 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 [2022-02-18 16:24:46,233 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:46,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 27 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:46,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-02-18 16:24:46,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 379. [2022-02-18 16:24:46,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 3.060846560846561) internal successors, (1157), 378 states have internal predecessors, (1157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:46,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1157 transitions. [2022-02-18 16:24:46,239 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1157 transitions. Word has length 18 [2022-02-18 16:24:46,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:46,239 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 1157 transitions. [2022-02-18 16:24:46,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2022-02-18 16:24:46,239 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1157 transitions. [2022-02-18 16:24:46,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:46,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:46,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:46,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-18 16:24:46,240 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:46,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:46,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1583210410, now seen corresponding path program 4 times [2022-02-18 16:24:46,240 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:46,240 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919546204] [2022-02-18 16:24:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:46,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 16:24:46,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:46,326 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919546204] [2022-02-18 16:24:46,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919546204] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:46,326 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:46,326 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:46,326 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743254892] [2022-02-18 16:24:46,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:46,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:46,326 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:46,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:46,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:46,326 INFO L87 Difference]: Start difference. First operand 379 states and 1157 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-18 16:24:46,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:46,417 INFO L93 Difference]: Finished difference Result 496 states and 1424 transitions. [2022-02-18 16:24:46,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:46,417 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2022-02-18 16:24:46,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:46,418 INFO L225 Difference]: With dead ends: 496 [2022-02-18 16:24:46,418 INFO L226 Difference]: Without dead ends: 496 [2022-02-18 16:24:46,418 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-02-18 16:24:46,418 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:46,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 35 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:46,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-02-18 16:24:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 359. [2022-02-18 16:24:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 3.0083798882681565) internal successors, (1077), 358 states have internal predecessors, (1077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1077 transitions. [2022-02-18 16:24:46,424 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1077 transitions. Word has length 18 [2022-02-18 16:24:46,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:46,424 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 1077 transitions. [2022-02-18 16:24:46,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-18 16:24:46,424 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1077 transitions. [2022-02-18 16:24:46,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:46,425 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:46,425 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:46,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-18 16:24:46,425 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:46,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:46,425 INFO L85 PathProgramCache]: Analyzing trace with hash 501511186, now seen corresponding path program 4 times [2022-02-18 16:24:46,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:46,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174385134] [2022-02-18 16:24:46,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:46,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 16:24:46,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:46,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174385134] [2022-02-18 16:24:46,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174385134] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:46,460 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:46,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:46,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101255104] [2022-02-18 16:24:46,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:46,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:46,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:46,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:46,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:46,461 INFO L87 Difference]: Start difference. First operand 359 states and 1077 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-18 16:24:46,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:46,503 INFO L93 Difference]: Finished difference Result 384 states and 1115 transitions. [2022-02-18 16:24:46,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:24:46,503 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2022-02-18 16:24:46,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:46,504 INFO L225 Difference]: With dead ends: 384 [2022-02-18 16:24:46,504 INFO L226 Difference]: Without dead ends: 376 [2022-02-18 16:24:46,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:46,504 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:46,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 21 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-18 16:24:46,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-02-18 16:24:46,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 357. [2022-02-18 16:24:46,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.00561797752809) internal successors, (1070), 356 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:46,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1070 transitions. [2022-02-18 16:24:46,520 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1070 transitions. Word has length 18 [2022-02-18 16:24:46,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:46,521 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1070 transitions. [2022-02-18 16:24:46,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-18 16:24:46,521 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1070 transitions. [2022-02-18 16:24:46,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:46,521 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:46,521 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:46,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-18 16:24:46,522 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:46,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:46,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1600489610, now seen corresponding path program 5 times [2022-02-18 16:24:46,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:46,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055953803] [2022-02-18 16:24:46,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:46,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 16:24:46,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:46,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055953803] [2022-02-18 16:24:46,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055953803] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:46,594 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:46,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:46,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30470741] [2022-02-18 16:24:46,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:46,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:46,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:46,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:46,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:46,595 INFO L87 Difference]: Start difference. First operand 357 states and 1070 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-18 16:24:46,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:46,659 INFO L93 Difference]: Finished difference Result 422 states and 1218 transitions. [2022-02-18 16:24:46,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-18 16:24:46,659 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2022-02-18 16:24:46,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:46,660 INFO L225 Difference]: With dead ends: 422 [2022-02-18 16:24:46,660 INFO L226 Difference]: Without dead ends: 414 [2022-02-18 16:24:46,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:46,660 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 32 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:46,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 24 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:46,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-02-18 16:24:46,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 359. [2022-02-18 16:24:46,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.9972067039106145) internal successors, (1073), 358 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:46,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1073 transitions. [2022-02-18 16:24:46,665 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1073 transitions. Word has length 18 [2022-02-18 16:24:46,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:46,665 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 1073 transitions. [2022-02-18 16:24:46,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-18 16:24:46,665 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1073 transitions. [2022-02-18 16:24:46,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-18 16:24:46,666 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:46,666 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:24:46,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-18 16:24:46,666 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:46,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:46,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1809790664, now seen corresponding path program 6 times [2022-02-18 16:24:46,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:46,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69607811] [2022-02-18 16:24:46,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:46,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:46,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-02-18 16:24:46,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:46,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69607811] [2022-02-18 16:24:46,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69607811] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-18 16:24:46,746 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-18 16:24:46,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-18 16:24:46,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525829819] [2022-02-18 16:24:46,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-18 16:24:46,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-18 16:24:46,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:46,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-18 16:24:46,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-18 16:24:46,747 INFO L87 Difference]: Start difference. First operand 359 states and 1073 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-18 16:24:46,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:46,826 INFO L93 Difference]: Finished difference Result 386 states and 1114 transitions. [2022-02-18 16:24:46,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-18 16:24:46,826 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 [2022-02-18 16:24:46,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:46,827 INFO L225 Difference]: With dead ends: 386 [2022-02-18 16:24:46,827 INFO L226 Difference]: Without dead ends: 374 [2022-02-18 16:24:46,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-02-18 16:24:46,827 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:46,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 25 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-18 16:24:46,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-02-18 16:24:46,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 357. [2022-02-18 16:24:46,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 3.002808988764045) internal successors, (1069), 356 states have internal predecessors, (1069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1069 transitions. [2022-02-18 16:24:46,832 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1069 transitions. Word has length 18 [2022-02-18 16:24:46,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:46,832 INFO L470 AbstractCegarLoop]: Abstraction has 357 states and 1069 transitions. [2022-02-18 16:24:46,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2022-02-18 16:24:46,832 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1069 transitions. [2022-02-18 16:24:46,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:24:46,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:46,833 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] [2022-02-18 16:24:46,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-18 16:24:46,833 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:46,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:46,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1571044037, now seen corresponding path program 1 times [2022-02-18 16:24:46,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:46,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687332717] [2022-02-18 16:24:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:46,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:47,144 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:47,144 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:47,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687332717] [2022-02-18 16:24:47,144 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687332717] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:24:47,144 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680752444] [2022-02-18 16:24:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:47,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:24:47,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:24:47,145 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) [2022-02-18 16:24:47,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-18 16:24:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:47,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:24:47,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:24:47,672 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 369 treesize of output 317 [2022-02-18 16:24:48,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 338 treesize of output 302 [2022-02-18 16:24:48,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 302 treesize of output 250 [2022-02-18 16:24:48,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:48,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:24:49,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:24:50,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:24:50,344 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 446 treesize of output 390 [2022-02-18 16:24:51,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:24:51,006 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 20 treesize of output 18 [2022-02-18 16:24:51,203 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:24:51,204 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 248 treesize of output 211 [2022-02-18 16:24:51,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 157 [2022-02-18 16:24:51,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:51,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680752444] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:24:51,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:24:51,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:24:51,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294501519] [2022-02-18 16:24:51,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:24:51,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:24:51,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:51,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:24:51,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:24:51,268 INFO L87 Difference]: Start difference. First operand 357 states and 1069 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:24:53,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:24:53,281 INFO L93 Difference]: Finished difference Result 703 states and 2062 transitions. [2022-02-18 16:24:53,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-18 16:24:53,282 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 20 [2022-02-18 16:24:53,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:24:53,283 INFO L225 Difference]: With dead ends: 703 [2022-02-18 16:24:53,283 INFO L226 Difference]: Without dead ends: 688 [2022-02-18 16:24:53,284 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=291, Invalid=1269, Unknown=0, NotChecked=0, Total=1560 [2022-02-18 16:24:53,284 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 277 mSDsluCounter, 541 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 1055 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:24:53,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 231 Invalid, 1055 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-18 16:24:53,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-02-18 16:24:53,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 386. [2022-02-18 16:24:53,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 3.0623376623376624) internal successors, (1179), 385 states have internal predecessors, (1179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:24:53,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1179 transitions. [2022-02-18 16:24:53,290 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1179 transitions. Word has length 20 [2022-02-18 16:24:53,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:24:53,290 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 1179 transitions. [2022-02-18 16:24:53,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:24:53,290 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1179 transitions. [2022-02-18 16:24:53,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:24:53,291 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:24:53,291 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] [2022-02-18 16:24:53,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-18 16:24:53,511 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,SelfDestructingSolverStorable50 [2022-02-18 16:24:53,512 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:24:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:24:53,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1107730749, now seen corresponding path program 2 times [2022-02-18 16:24:53,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:24:53,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347164632] [2022-02-18 16:24:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:24:53,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:24:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:24:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:53,904 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:24:53,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347164632] [2022-02-18 16:24:53,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347164632] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:24:53,905 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598982693] [2022-02-18 16:24:53,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:24:53,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:24:53,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:24:53,906 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) [2022-02-18 16:24:53,906 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-18 16:24:53,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:24:53,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:24:53,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:24:53,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:24:54,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 341 treesize of output 301 [2022-02-18 16:24:55,073 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 349 treesize of output 297 [2022-02-18 16:24:55,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 297 treesize of output 261 [2022-02-18 16:24:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:55,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:24:56,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 135 [2022-02-18 16:24:56,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:24:56,839 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 493 treesize of output 429 [2022-02-18 16:24:57,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:24:57,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-02-18 16:24:57,709 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:24:57,709 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 211 [2022-02-18 16:24:57,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 157 [2022-02-18 16:24:57,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:24:57,784 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598982693] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:24:57,784 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:24:57,784 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:24:57,784 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497060786] [2022-02-18 16:24:57,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:24:57,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:24:57,784 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:24:57,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:24:57,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=669, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:24:57,785 INFO L87 Difference]: Start difference. First operand 386 states and 1179 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-18 16:25:01,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:25:01,965 INFO L93 Difference]: Finished difference Result 731 states and 2154 transitions. [2022-02-18 16:25:01,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-18 16:25:01,965 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 20 [2022-02-18 16:25:01,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:25:01,966 INFO L225 Difference]: With dead ends: 731 [2022-02-18 16:25:01,966 INFO L226 Difference]: Without dead ends: 716 [2022-02-18 16:25:01,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=352, Invalid=1810, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 16:25:01,967 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 244 mSDsluCounter, 628 mSDsCounter, 0 mSdLazyCounter, 1329 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:25:01,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 327 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1329 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 16:25:01,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2022-02-18 16:25:01,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 396. [2022-02-18 16:25:01,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 3.050632911392405) internal successors, (1205), 395 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:01,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1205 transitions. [2022-02-18 16:25:01,973 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1205 transitions. Word has length 20 [2022-02-18 16:25:01,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:25:01,973 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 1205 transitions. [2022-02-18 16:25:01,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-18 16:25:01,973 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1205 transitions. [2022-02-18 16:25:01,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:25:01,974 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:25:01,974 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] [2022-02-18 16:25:01,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-18 16:25:02,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:02,174 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:25:02,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:25:02,174 INFO L85 PathProgramCache]: Analyzing trace with hash 335237243, now seen corresponding path program 3 times [2022-02-18 16:25:02,175 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:25:02,175 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624777362] [2022-02-18 16:25:02,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:25:02,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:25:02,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:25:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:02,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:25:02,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624777362] [2022-02-18 16:25:02,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624777362] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:25:02,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402923584] [2022-02-18 16:25:02,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:25:02,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:02,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:25:02,483 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) [2022-02-18 16:25:02,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-18 16:25:02,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-18 16:25:02,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:25:02,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:25:02,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:25:02,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 299 treesize of output 251 [2022-02-18 16:25:03,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 343 treesize of output 295 [2022-02-18 16:25:03,769 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 295 treesize of output 255 [2022-02-18 16:25:04,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:04,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:25:05,088 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 12 treesize of output 10 [2022-02-18 16:25:05,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:05,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 405 treesize of output 349 [2022-02-18 16:25:05,939 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 22 treesize of output 20 [2022-02-18 16:25:05,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-02-18 16:25:06,186 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:25:06,186 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 248 treesize of output 211 [2022-02-18 16:25:06,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 157 [2022-02-18 16:25:06,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:06,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402923584] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:25:06,265 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:25:06,265 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:25:06,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962649699] [2022-02-18 16:25:06,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:25:06,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:25:06,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:25:06,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:25:06,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:25:06,266 INFO L87 Difference]: Start difference. First operand 396 states and 1205 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-18 16:25:10,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:25:10,495 INFO L93 Difference]: Finished difference Result 707 states and 2081 transitions. [2022-02-18 16:25:10,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-18 16:25:10,495 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 20 [2022-02-18 16:25:10,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:25:10,496 INFO L225 Difference]: With dead ends: 707 [2022-02-18 16:25:10,496 INFO L226 Difference]: Without dead ends: 692 [2022-02-18 16:25:10,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2022-02-18 16:25:10,497 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 178 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 2271 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 2318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:25:10,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 528 Invalid, 2318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2271 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-18 16:25:10,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-02-18 16:25:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 412. [2022-02-18 16:25:10,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 3.0316301703163018) internal successors, (1246), 411 states have internal predecessors, (1246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:10,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1246 transitions. [2022-02-18 16:25:10,503 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1246 transitions. Word has length 20 [2022-02-18 16:25:10,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:25:10,503 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 1246 transitions. [2022-02-18 16:25:10,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-18 16:25:10,503 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1246 transitions. [2022-02-18 16:25:10,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:25:10,504 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:25:10,504 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] [2022-02-18 16:25:10,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-18 16:25:10,718 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,SelfDestructingSolverStorable52 [2022-02-18 16:25:10,718 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:25:10,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:25:10,718 INFO L85 PathProgramCache]: Analyzing trace with hash 66528419, now seen corresponding path program 4 times [2022-02-18 16:25:10,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:25:10,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275175570] [2022-02-18 16:25:10,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:25:10,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:25:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:25:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:11,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:25:11,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275175570] [2022-02-18 16:25:11,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275175570] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:25:11,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613653372] [2022-02-18 16:25:11,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:25:11,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:11,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:25:11,004 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) [2022-02-18 16:25:11,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-18 16:25:11,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:25:11,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:25:11,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:25:11,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:25:11,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 240 [2022-02-18 16:25:11,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 233 [2022-02-18 16:25:11,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-02-18 16:25:12,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:12,114 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:25:12,414 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 113 treesize of output 103 [2022-02-18 16:25:13,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:13,573 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 523 treesize of output 459 [2022-02-18 16:25:14,615 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 22 treesize of output 20 [2022-02-18 16:25:14,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-02-18 16:25:14,831 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:25:14,831 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 211 [2022-02-18 16:25:14,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 157 [2022-02-18 16:25:14,902 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:14,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613653372] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:25:14,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:25:14,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:25:14,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639455104] [2022-02-18 16:25:14,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:25:14,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:25:14,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:25:14,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:25:14,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:25:14,904 INFO L87 Difference]: Start difference. First operand 412 states and 1246 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:25:16,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:25:16,031 INFO L93 Difference]: Finished difference Result 683 states and 2023 transitions. [2022-02-18 16:25:16,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-18 16:25:16,031 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 20 [2022-02-18 16:25:16,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:25:16,032 INFO L225 Difference]: With dead ends: 683 [2022-02-18 16:25:16,032 INFO L226 Difference]: Without dead ends: 668 [2022-02-18 16:25:16,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=270, Invalid=1136, Unknown=0, NotChecked=0, Total=1406 [2022-02-18 16:25:16,033 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 179 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:25:16,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 178 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:25:16,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2022-02-18 16:25:16,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 418. [2022-02-18 16:25:16,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 417 states have (on average 3.038369304556355) internal successors, (1267), 417 states have internal predecessors, (1267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:16,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 1267 transitions. [2022-02-18 16:25:16,040 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 1267 transitions. Word has length 20 [2022-02-18 16:25:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:25:16,040 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 1267 transitions. [2022-02-18 16:25:16,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:25:16,040 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 1267 transitions. [2022-02-18 16:25:16,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:25:16,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:25:16,041 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] [2022-02-18 16:25:16,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-18 16:25:16,241 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,SelfDestructingSolverStorable53 [2022-02-18 16:25:16,241 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:25:16,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:25:16,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1549664091, now seen corresponding path program 5 times [2022-02-18 16:25:16,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:25:16,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966828183] [2022-02-18 16:25:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:25:16,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:25:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:25:16,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:16,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:25:16,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966828183] [2022-02-18 16:25:16,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966828183] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:25:16,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559915981] [2022-02-18 16:25:16,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:25:16,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:16,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:25:16,663 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) [2022-02-18 16:25:16,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-02-18 16:25:16,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:25:16,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:25:16,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:25:16,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:25:17,257 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 390 treesize of output 342 [2022-02-18 16:25:17,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 225 [2022-02-18 16:25:17,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 197 [2022-02-18 16:25:18,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:18,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:25:18,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 132 [2022-02-18 16:25:19,266 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:19,267 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 518 treesize of output 454 [2022-02-18 16:25:20,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:25:20,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-02-18 16:25:20,437 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:25:20,437 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 297 [2022-02-18 16:25:20,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 294 treesize of output 246 [2022-02-18 16:25:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:20,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559915981] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:25:20,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:25:20,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:25:20,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384191415] [2022-02-18 16:25:20,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:25:20,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:25:20,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:25:20,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:25:20,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:25:20,514 INFO L87 Difference]: Start difference. First operand 418 states and 1267 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-18 16:25:24,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:25:24,535 INFO L93 Difference]: Finished difference Result 706 states and 2078 transitions. [2022-02-18 16:25:24,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-18 16:25:24,535 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 20 [2022-02-18 16:25:24,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:25:24,536 INFO L225 Difference]: With dead ends: 706 [2022-02-18 16:25:24,536 INFO L226 Difference]: Without dead ends: 691 [2022-02-18 16:25:24,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=489, Invalid=2481, Unknown=0, NotChecked=0, Total=2970 [2022-02-18 16:25:24,551 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 118 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 2105 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 2105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:25:24,551 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 488 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 2105 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-18 16:25:24,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-02-18 16:25:24,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 415. [2022-02-18 16:25:24,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 3.031400966183575) internal successors, (1255), 414 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:24,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1255 transitions. [2022-02-18 16:25:24,557 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1255 transitions. Word has length 20 [2022-02-18 16:25:24,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:25:24,557 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 1255 transitions. [2022-02-18 16:25:24,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-18 16:25:24,557 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1255 transitions. [2022-02-18 16:25:24,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:25:24,558 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:25:24,558 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] [2022-02-18 16:25:24,581 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-02-18 16:25:24,764 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,SelfDestructingSolverStorable54 [2022-02-18 16:25:24,765 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:25:24,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:25:24,765 INFO L85 PathProgramCache]: Analyzing trace with hash 229326531, now seen corresponding path program 6 times [2022-02-18 16:25:24,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:25:24,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605703064] [2022-02-18 16:25:24,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:25:24,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:25:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:25:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:25,055 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:25:25,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605703064] [2022-02-18 16:25:25,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605703064] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:25:25,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123278415] [2022-02-18 16:25:25,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:25:25,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:25,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:25:25,057 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) [2022-02-18 16:25:25,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-02-18 16:25:25,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 16:25:25,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:25:25,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:25:25,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:25:25,511 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 222 treesize of output 194 [2022-02-18 16:25:25,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 362 treesize of output 314 [2022-02-18 16:25:25,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 266 [2022-02-18 16:25:26,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:26,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:25:26,725 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 113 treesize of output 103 [2022-02-18 16:25:27,717 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:27,717 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 456 treesize of output 416 [2022-02-18 16:25:28,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:25:28,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-02-18 16:25:29,035 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:25:29,036 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 245 treesize of output 208 [2022-02-18 16:25:29,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 157 [2022-02-18 16:25:29,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:29,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123278415] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:25:29,098 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:25:29,098 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:25:29,098 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538323488] [2022-02-18 16:25:29,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:25:29,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:25:29,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:25:29,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:25:29,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:25:29,098 INFO L87 Difference]: Start difference. First operand 415 states and 1255 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-18 16:25:29,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:25:29,930 INFO L93 Difference]: Finished difference Result 617 states and 1844 transitions. [2022-02-18 16:25:29,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-18 16:25:29,930 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 20 [2022-02-18 16:25:29,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:25:29,931 INFO L225 Difference]: With dead ends: 617 [2022-02-18 16:25:29,931 INFO L226 Difference]: Without dead ends: 602 [2022-02-18 16:25:29,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2022-02-18 16:25:29,932 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 106 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:25:29,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 196 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-18 16:25:29,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-02-18 16:25:29,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 424. [2022-02-18 16:25:29,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 3.0307328605200947) internal successors, (1282), 423 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:29,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1282 transitions. [2022-02-18 16:25:29,937 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1282 transitions. Word has length 20 [2022-02-18 16:25:29,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:25:29,937 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 1282 transitions. [2022-02-18 16:25:29,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-18 16:25:29,937 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1282 transitions. [2022-02-18 16:25:29,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:25:29,938 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:25:29,938 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] [2022-02-18 16:25:29,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-02-18 16:25:30,154 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,SelfDestructingSolverStorable55 [2022-02-18 16:25:30,154 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:25:30,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:25:30,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1925465403, now seen corresponding path program 7 times [2022-02-18 16:25:30,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:25:30,155 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415760131] [2022-02-18 16:25:30,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:25:30,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:25:30,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:25:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:30,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:25:30,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415760131] [2022-02-18 16:25:30,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415760131] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:25:30,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791346777] [2022-02-18 16:25:30,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:25:30,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:30,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:25:30,443 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) [2022-02-18 16:25:30,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-02-18 16:25:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:25:30,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:25:30,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:25:30,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 249 treesize of output 221 [2022-02-18 16:25:31,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 302 treesize of output 258 [2022-02-18 16:25:31,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 222 [2022-02-18 16:25:31,627 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:31,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:25:31,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:25:32,920 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:32,920 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 417 treesize of output 381 [2022-02-18 16:25:33,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:25:33,249 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-02-18 16:25:33,484 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:25:33,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 246 treesize of output 209 [2022-02-18 16:25:33,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 185 treesize of output 157 [2022-02-18 16:25:33,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:33,537 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791346777] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:25:33,537 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:25:33,537 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:25:33,537 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417913399] [2022-02-18 16:25:33,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:25:33,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:25:33,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:25:33,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:25:33,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:25:33,537 INFO L87 Difference]: Start difference. First operand 424 states and 1282 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:25:34,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:25:34,757 INFO L93 Difference]: Finished difference Result 714 states and 2118 transitions. [2022-02-18 16:25:34,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-18 16:25:34,758 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 20 [2022-02-18 16:25:34,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:25:34,759 INFO L225 Difference]: With dead ends: 714 [2022-02-18 16:25:34,759 INFO L226 Difference]: Without dead ends: 699 [2022-02-18 16:25:34,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=229, Invalid=1031, Unknown=0, NotChecked=0, Total=1260 [2022-02-18 16:25:34,759 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 139 mSDsluCounter, 745 mSDsCounter, 0 mSdLazyCounter, 1339 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 16:25:34,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 288 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1339 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-18 16:25:34,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-02-18 16:25:34,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 436. [2022-02-18 16:25:34,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.0298850574712644) internal successors, (1318), 435 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:34,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1318 transitions. [2022-02-18 16:25:34,765 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1318 transitions. Word has length 20 [2022-02-18 16:25:34,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:25:34,766 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1318 transitions. [2022-02-18 16:25:34,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:25:34,766 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1318 transitions. [2022-02-18 16:25:34,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:25:34,766 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:25:34,766 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] [2022-02-18 16:25:34,791 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-02-18 16:25:34,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:34,979 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:25:34,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:25:34,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1896691395, now seen corresponding path program 8 times [2022-02-18 16:25:34,980 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:25:34,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052069502] [2022-02-18 16:25:34,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:25:34,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:25:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:25:35,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:35,279 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:25:35,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052069502] [2022-02-18 16:25:35,279 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052069502] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:25:35,279 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612241025] [2022-02-18 16:25:35,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:25:35,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:35,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:25:35,280 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) [2022-02-18 16:25:35,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-02-18 16:25:35,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:25:35,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:25:35,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:25:35,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:25:35,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 260 [2022-02-18 16:25:36,192 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 316 treesize of output 276 [2022-02-18 16:25:36,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 276 treesize of output 236 [2022-02-18 16:25:36,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:36,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:25:36,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:25:38,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:38,199 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 524 treesize of output 460 [2022-02-18 16:25:39,182 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 22 treesize of output 20 [2022-02-18 16:25:39,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-02-18 16:25:39,480 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:25:39,480 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 288 treesize of output 251 [2022-02-18 16:25:39,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 208 [2022-02-18 16:25:39,531 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:39,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612241025] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:25:39,531 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:25:39,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:25:39,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536462630] [2022-02-18 16:25:39,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:25:39,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:25:39,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:25:39,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:25:39,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:25:39,532 INFO L87 Difference]: Start difference. First operand 436 states and 1318 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:25:41,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:25:41,213 INFO L93 Difference]: Finished difference Result 725 states and 2156 transitions. [2022-02-18 16:25:41,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-18 16:25:41,214 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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 20 [2022-02-18 16:25:41,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:25:41,215 INFO L225 Difference]: With dead ends: 725 [2022-02-18 16:25:41,215 INFO L226 Difference]: Without dead ends: 710 [2022-02-18 16:25:41,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=286, Invalid=1354, Unknown=0, NotChecked=0, Total=1640 [2022-02-18 16:25:41,215 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 119 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 945 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:25:41,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 208 Invalid, 1000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 945 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-18 16:25:41,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2022-02-18 16:25:41,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 442. [2022-02-18 16:25:41,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 3.036281179138322) internal successors, (1339), 441 states have internal predecessors, (1339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:41,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1339 transitions. [2022-02-18 16:25:41,221 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1339 transitions. Word has length 20 [2022-02-18 16:25:41,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:25:41,222 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1339 transitions. [2022-02-18 16:25:41,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 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) [2022-02-18 16:25:41,222 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1339 transitions. [2022-02-18 16:25:41,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:25:41,222 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:25:41,222 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] [2022-02-18 16:25:41,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-02-18 16:25:41,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:41,423 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:25:41,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:25:41,423 INFO L85 PathProgramCache]: Analyzing trace with hash 280498885, now seen corresponding path program 9 times [2022-02-18 16:25:41,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:25:41,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53151142] [2022-02-18 16:25:41,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:25:41,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:25:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:25:41,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:41,715 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:25:41,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53151142] [2022-02-18 16:25:41,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53151142] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:25:41,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111535763] [2022-02-18 16:25:41,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:25:41,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:41,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:25:41,716 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) [2022-02-18 16:25:41,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-02-18 16:25:41,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-18 16:25:41,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:25:41,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:25:41,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:25:42,170 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 341 treesize of output 305 [2022-02-18 16:25:42,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 221 [2022-02-18 16:25:42,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 197 [2022-02-18 16:25:42,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:42,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:25:43,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 135 [2022-02-18 16:25:44,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:44,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 533 treesize of output 477 [2022-02-18 16:25:45,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:25:45,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-02-18 16:25:45,537 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:25:45,537 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 306 treesize of output 261 [2022-02-18 16:25:45,541 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 231 treesize of output 195 [2022-02-18 16:25:45,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:45,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111535763] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:25:45,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:25:45,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:25:45,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536414630] [2022-02-18 16:25:45,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:25:45,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:25:45,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:25:45,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:25:45,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:25:45,599 INFO L87 Difference]: Start difference. First operand 442 states and 1339 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-18 16:25:49,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:25:49,425 INFO L93 Difference]: Finished difference Result 751 states and 2210 transitions. [2022-02-18 16:25:49,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-18 16:25:49,425 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 20 [2022-02-18 16:25:49,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:25:49,426 INFO L225 Difference]: With dead ends: 751 [2022-02-18 16:25:49,426 INFO L226 Difference]: Without dead ends: 736 [2022-02-18 16:25:49,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=468, Invalid=2184, Unknown=0, NotChecked=0, Total=2652 [2022-02-18 16:25:49,427 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 144 mSDsluCounter, 1134 mSDsCounter, 0 mSdLazyCounter, 2093 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:25:49,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 488 Invalid, 2136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2093 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-18 16:25:49,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-02-18 16:25:49,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 439. [2022-02-18 16:25:49,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 3.029680365296804) internal successors, (1327), 438 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:49,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1327 transitions. [2022-02-18 16:25:49,433 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1327 transitions. Word has length 20 [2022-02-18 16:25:49,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:25:49,433 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1327 transitions. [2022-02-18 16:25:49,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-18 16:25:49,433 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1327 transitions. [2022-02-18 16:25:49,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:25:49,434 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:25:49,434 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] [2022-02-18 16:25:49,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-02-18 16:25:49,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-02-18 16:25:49,634 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:25:49,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:25:49,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2059489507, now seen corresponding path program 10 times [2022-02-18 16:25:49,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:25:49,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307968830] [2022-02-18 16:25:49,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:25:49,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:25:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:25:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:50,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:25:50,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307968830] [2022-02-18 16:25:50,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307968830] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:25:50,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737520480] [2022-02-18 16:25:50,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:25:50,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:50,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:25:50,032 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) [2022-02-18 16:25:50,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-02-18 16:25:50,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:25:50,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:25:50,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:25:50,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:25:50,443 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 222 treesize of output 198 [2022-02-18 16:25:50,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 366 treesize of output 326 [2022-02-18 16:25:50,658 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 326 treesize of output 270 [2022-02-18 16:25:51,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:51,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:25:51,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:25:52,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:25:52,517 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 456 treesize of output 416 [2022-02-18 16:25:53,335 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 22 treesize of output 20 [2022-02-18 16:25:53,338 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-02-18 16:25:53,555 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:25:53,556 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 269 treesize of output 232 [2022-02-18 16:25:53,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 229 treesize of output 197 [2022-02-18 16:25:53,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:53,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737520480] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:25:53,610 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:25:53,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:25:53,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61925601] [2022-02-18 16:25:53,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:25:53,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:25:53,611 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:25:53,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:25:53,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:25:53,611 INFO L87 Difference]: Start difference. First operand 439 states and 1327 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-18 16:25:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:25:56,000 INFO L93 Difference]: Finished difference Result 722 states and 2155 transitions. [2022-02-18 16:25:56,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-18 16:25:56,001 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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 20 [2022-02-18 16:25:56,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:25:56,002 INFO L225 Difference]: With dead ends: 722 [2022-02-18 16:25:56,002 INFO L226 Difference]: Without dead ends: 707 [2022-02-18 16:25:56,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=298, Invalid=1508, Unknown=0, NotChecked=0, Total=1806 [2022-02-18 16:25:56,002 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 133 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-18 16:25:56,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 333 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-18 16:25:56,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2022-02-18 16:25:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 436. [2022-02-18 16:25:56,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 435 states have (on average 3.0298850574712644) internal successors, (1318), 435 states have internal predecessors, (1318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:25:56,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 1318 transitions. [2022-02-18 16:25:56,008 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 1318 transitions. Word has length 20 [2022-02-18 16:25:56,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:25:56,009 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 1318 transitions. [2022-02-18 16:25:56,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 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) [2022-02-18 16:25:56,009 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 1318 transitions. [2022-02-18 16:25:56,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:25:56,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:25:56,009 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] [2022-02-18 16:25:56,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-02-18 16:25:56,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-02-18 16:25:56,226 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:25:56,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:25:56,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1956356129, now seen corresponding path program 11 times [2022-02-18 16:25:56,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:25:56,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550227058] [2022-02-18 16:25:56,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:25:56,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:25:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:25:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:56,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:25:56,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550227058] [2022-02-18 16:25:56,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550227058] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:25:56,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399451276] [2022-02-18 16:25:56,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:25:56,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:25:56,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:25:56,612 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) [2022-02-18 16:25:56,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-02-18 16:25:56,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 16:25:56,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:25:56,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:25:56,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:25:56,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 359 treesize of output 311 [2022-02-18 16:25:57,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 363 treesize of output 315 [2022-02-18 16:25:57,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 315 treesize of output 267 [2022-02-18 16:25:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:25:58,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:25:58,752 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 115 treesize of output 105 [2022-02-18 16:25:59,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:26:00,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-02-18 16:26:00,305 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:00,305 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 352 treesize of output 308 [2022-02-18 16:26:00,844 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:00,844 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 377 treesize of output 321 [2022-02-18 16:26:00,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:00,851 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 313 treesize of output 281 [2022-02-18 16:26:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:00,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399451276] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:26:00,986 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:26:00,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:26:00,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843424679] [2022-02-18 16:26:00,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:26:00,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:26:00,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:26:00,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:26:00,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:26:00,986 INFO L87 Difference]: Start difference. First operand 436 states and 1318 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:26:12,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:26:12,689 INFO L93 Difference]: Finished difference Result 1625 states and 4499 transitions. [2022-02-18 16:26:12,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-18 16:26:12,690 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:26:12,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:26:12,692 INFO L225 Difference]: With dead ends: 1625 [2022-02-18 16:26:12,692 INFO L226 Difference]: Without dead ends: 1451 [2022-02-18 16:26:12,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2364 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=1295, Invalid=6187, Unknown=0, NotChecked=0, Total=7482 [2022-02-18 16:26:12,693 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 467 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 2137 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 2337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 2137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-18 16:26:12,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 626 Invalid, 2337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 2137 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-18 16:26:12,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2022-02-18 16:26:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 487. [2022-02-18 16:26:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 3.111111111111111) internal successors, (1512), 486 states have internal predecessors, (1512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:26:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1512 transitions. [2022-02-18 16:26:12,702 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1512 transitions. Word has length 20 [2022-02-18 16:26:12,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:26:12,703 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 1512 transitions. [2022-02-18 16:26:12,703 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:26:12,703 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1512 transitions. [2022-02-18 16:26:12,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:26:12,703 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:26:12,704 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] [2022-02-18 16:26:12,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-02-18 16:26:12,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:12,904 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:26:12,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:26:12,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1686627103, now seen corresponding path program 12 times [2022-02-18 16:26:12,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:26:12,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365812164] [2022-02-18 16:26:12,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:26:12,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:26:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:26:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:13,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:26:13,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365812164] [2022-02-18 16:26:13,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365812164] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:26:13,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968939513] [2022-02-18 16:26:13,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:26:13,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:13,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:26:13,267 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) [2022-02-18 16:26:13,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-02-18 16:26:13,297 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 16:26:13,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:26:13,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:26:13,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:26:13,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 264 [2022-02-18 16:26:13,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 306 treesize of output 270 [2022-02-18 16:26:13,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 226 [2022-02-18 16:26:14,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:14,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:26:14,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 41 [2022-02-18 16:26:15,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 140 [2022-02-18 16:26:15,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 130 [2022-02-18 16:26:16,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:16,537 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 304 treesize of output 272 [2022-02-18 16:26:17,026 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:17,027 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 369 treesize of output 317 [2022-02-18 16:26:17,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:17,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 309 treesize of output 281 [2022-02-18 16:26:17,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:17,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968939513] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:26:17,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:26:17,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:26:17,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560370333] [2022-02-18 16:26:17,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:26:17,232 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:26:17,232 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:26:17,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:26:17,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:26:17,232 INFO L87 Difference]: Start difference. First operand 487 states and 1512 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:26:22,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:26:22,304 INFO L93 Difference]: Finished difference Result 912 states and 2673 transitions. [2022-02-18 16:26:22,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-18 16:26:22,305 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:26:22,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:26:22,306 INFO L225 Difference]: With dead ends: 912 [2022-02-18 16:26:22,306 INFO L226 Difference]: Without dead ends: 882 [2022-02-18 16:26:22,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=622, Invalid=2240, Unknown=0, NotChecked=0, Total=2862 [2022-02-18 16:26:22,307 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 332 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:26:22,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [332 Valid, 333 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 16:26:22,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2022-02-18 16:26:22,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 496. [2022-02-18 16:26:22,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 495 states have (on average 3.1313131313131315) internal successors, (1550), 495 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:26:22,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 1550 transitions. [2022-02-18 16:26:22,314 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 1550 transitions. Word has length 20 [2022-02-18 16:26:22,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:26:22,314 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 1550 transitions. [2022-02-18 16:26:22,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:26:22,315 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 1550 transitions. [2022-02-18 16:26:22,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:26:22,315 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:26:22,315 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] [2022-02-18 16:26:22,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-02-18 16:26:22,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:22,532 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:26:22,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:26:22,532 INFO L85 PathProgramCache]: Analyzing trace with hash 153769067, now seen corresponding path program 13 times [2022-02-18 16:26:22,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:26:22,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75091029] [2022-02-18 16:26:22,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:26:22,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:26:22,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:26:23,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:23,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:26:23,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75091029] [2022-02-18 16:26:23,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75091029] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:26:23,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313515052] [2022-02-18 16:26:23,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:26:23,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:23,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:26:23,015 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) [2022-02-18 16:26:23,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-02-18 16:26:23,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:26:23,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:26:23,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:26:23,312 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 313 treesize of output 269 [2022-02-18 16:26:24,191 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 274 treesize of output 234 [2022-02-18 16:26:24,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 234 treesize of output 206 [2022-02-18 16:26:24,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:24,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:26:25,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 133 [2022-02-18 16:26:25,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 221 treesize of output 211 [2022-02-18 16:26:25,787 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 211 treesize of output 201 [2022-02-18 16:26:26,228 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:26,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 355 treesize of output 315 [2022-02-18 16:26:26,694 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:26,694 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 393 treesize of output 337 [2022-02-18 16:26:26,701 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:26,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 329 treesize of output 297 [2022-02-18 16:26:26,888 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:26,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313515052] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:26:26,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:26:26,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:26:26,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554451988] [2022-02-18 16:26:26,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:26:26,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:26:26,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:26:26,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:26:26,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:26:26,889 INFO L87 Difference]: Start difference. First operand 496 states and 1550 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:26:32,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:26:32,936 INFO L93 Difference]: Finished difference Result 872 states and 2591 transitions. [2022-02-18 16:26:32,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-18 16:26:32,937 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:26:32,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:26:32,938 INFO L225 Difference]: With dead ends: 872 [2022-02-18 16:26:32,938 INFO L226 Difference]: Without dead ends: 827 [2022-02-18 16:26:32,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=498, Invalid=2694, Unknown=0, NotChecked=0, Total=3192 [2022-02-18 16:26:32,940 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 223 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 1437 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 1546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 1437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-18 16:26:32,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 441 Invalid, 1546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 1437 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-18 16:26:32,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 827 states. [2022-02-18 16:26:32,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 827 to 497. [2022-02-18 16:26:32,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 3.1330645161290325) internal successors, (1554), 496 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:26:32,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1554 transitions. [2022-02-18 16:26:32,947 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1554 transitions. Word has length 20 [2022-02-18 16:26:32,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:26:32,948 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1554 transitions. [2022-02-18 16:26:32,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:26:32,948 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1554 transitions. [2022-02-18 16:26:32,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:26:32,948 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:26:32,948 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] [2022-02-18 16:26:32,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-02-18 16:26:33,151 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,SelfDestructingSolverStorable62 [2022-02-18 16:26:33,151 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:26:33,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:26:33,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1961155825, now seen corresponding path program 14 times [2022-02-18 16:26:33,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:26:33,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421423462] [2022-02-18 16:26:33,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:26:33,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:26:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:26:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:33,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:26:33,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421423462] [2022-02-18 16:26:33,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421423462] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:26:33,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929919705] [2022-02-18 16:26:33,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:26:33,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:33,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:26:33,448 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) [2022-02-18 16:26:33,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-02-18 16:26:33,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:26:33,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:26:33,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:26:33,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:26:33,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:26:33,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 363 treesize of output 319 [2022-02-18 16:26:35,185 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:26:35,186 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 314 treesize of output 270 [2022-02-18 16:26:35,189 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 234 [2022-02-18 16:26:35,580 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:35,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:26:35,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:26:36,750 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:36,750 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 351 treesize of output 307 [2022-02-18 16:26:37,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:37,143 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 353 treesize of output 301 [2022-02-18 16:26:37,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:37,152 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 293 treesize of output 265 [2022-02-18 16:26:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:37,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929919705] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:26:37,321 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:26:37,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:26:37,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278931928] [2022-02-18 16:26:37,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:26:37,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:26:37,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:26:37,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:26:37,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:26:37,322 INFO L87 Difference]: Start difference. First operand 497 states and 1554 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) [2022-02-18 16:26:37,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:26:37,679 INFO L93 Difference]: Finished difference Result 657 states and 2065 transitions. [2022-02-18 16:26:37,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-18 16:26:37,680 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 20 [2022-02-18 16:26:37,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:26:37,681 INFO L225 Difference]: With dead ends: 657 [2022-02-18 16:26:37,681 INFO L226 Difference]: Without dead ends: 642 [2022-02-18 16:26:37,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:26:37,681 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 59 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 16:26:37,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 191 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 341 Invalid, 0 Unknown, 169 Unchecked, 0.2s Time] [2022-02-18 16:26:37,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2022-02-18 16:26:37,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 505. [2022-02-18 16:26:37,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.138888888888889) internal successors, (1582), 504 states have internal predecessors, (1582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:26:37,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1582 transitions. [2022-02-18 16:26:37,688 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1582 transitions. Word has length 20 [2022-02-18 16:26:37,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:26:37,688 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1582 transitions. [2022-02-18 16:26:37,688 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) [2022-02-18 16:26:37,688 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1582 transitions. [2022-02-18 16:26:37,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:26:37,689 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:26:37,689 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] [2022-02-18 16:26:37,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-02-18 16:26:37,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:37,903 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:26:37,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:26:37,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1402517995, now seen corresponding path program 15 times [2022-02-18 16:26:37,904 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:26:37,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909088069] [2022-02-18 16:26:37,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:26:37,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:26:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:26:38,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:38,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:26:38,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909088069] [2022-02-18 16:26:38,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909088069] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:26:38,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153265441] [2022-02-18 16:26:38,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:26:38,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:38,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:26:38,211 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) [2022-02-18 16:26:38,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-02-18 16:26:38,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-18 16:26:38,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:26:38,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:26:38,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:26:38,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:26:38,493 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 371 treesize of output 327 [2022-02-18 16:26:40,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:26:40,040 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 270 treesize of output 234 [2022-02-18 16:26:40,043 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 234 treesize of output 202 [2022-02-18 16:26:40,463 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:40,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:26:40,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:26:41,603 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:41,603 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 297 treesize of output 261 [2022-02-18 16:26:41,995 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:41,996 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 353 treesize of output 301 [2022-02-18 16:26:42,003 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:42,003 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 293 treesize of output 265 [2022-02-18 16:26:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:42,189 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153265441] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:26:42,189 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:26:42,189 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:26:42,189 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792119856] [2022-02-18 16:26:42,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:26:42,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:26:42,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:26:42,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:26:42,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:26:42,190 INFO L87 Difference]: Start difference. First operand 505 states and 1582 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) [2022-02-18 16:26:42,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:26:42,863 INFO L93 Difference]: Finished difference Result 765 states and 2293 transitions. [2022-02-18 16:26:42,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-18 16:26:42,864 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 20 [2022-02-18 16:26:42,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:26:42,865 INFO L225 Difference]: With dead ends: 765 [2022-02-18 16:26:42,865 INFO L226 Difference]: Without dead ends: 750 [2022-02-18 16:26:42,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2022-02-18 16:26:42,865 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 140 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 392 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:26:42,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 284 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 704 Invalid, 0 Unknown, 392 Unchecked, 0.4s Time] [2022-02-18 16:26:42,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 750 states. [2022-02-18 16:26:42,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 750 to 516. [2022-02-18 16:26:42,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.145631067961165) internal successors, (1620), 515 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:26:42,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1620 transitions. [2022-02-18 16:26:42,873 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1620 transitions. Word has length 20 [2022-02-18 16:26:42,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:26:42,873 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1620 transitions. [2022-02-18 16:26:42,873 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) [2022-02-18 16:26:42,873 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1620 transitions. [2022-02-18 16:26:42,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:26:42,874 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:26:42,874 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] [2022-02-18 16:26:42,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-02-18 16:26:43,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:43,075 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:26:43,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:26:43,076 INFO L85 PathProgramCache]: Analyzing trace with hash 1884086173, now seen corresponding path program 16 times [2022-02-18 16:26:43,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:26:43,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770677717] [2022-02-18 16:26:43,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:26:43,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:26:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:26:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:43,415 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:26:43,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770677717] [2022-02-18 16:26:43,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770677717] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:26:43,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352958398] [2022-02-18 16:26:43,415 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:26:43,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:43,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:26:43,417 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) [2022-02-18 16:26:43,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-02-18 16:26:43,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:26:43,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:26:43,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:26:43,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:26:43,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 315 treesize of output 267 [2022-02-18 16:26:44,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 383 treesize of output 335 [2022-02-18 16:26:44,641 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 335 treesize of output 287 [2022-02-18 16:26:45,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:45,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:26:45,268 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 113 treesize of output 103 [2022-02-18 16:26:46,139 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:46,139 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 327 treesize of output 287 [2022-02-18 16:26:46,534 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:46,534 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 353 treesize of output 301 [2022-02-18 16:26:46,541 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:46,541 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 293 treesize of output 265 [2022-02-18 16:26:46,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:46,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352958398] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:26:46,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:26:46,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:26:46,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974779858] [2022-02-18 16:26:46,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:26:46,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:26:46,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:26:46,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:26:46,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:26:46,768 INFO L87 Difference]: Start difference. First operand 516 states and 1620 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:26:48,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:26:48,165 INFO L93 Difference]: Finished difference Result 771 states and 2301 transitions. [2022-02-18 16:26:48,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-18 16:26:48,165 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:26:48,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:26:48,166 INFO L225 Difference]: With dead ends: 771 [2022-02-18 16:26:48,166 INFO L226 Difference]: Without dead ends: 756 [2022-02-18 16:26:48,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2022-02-18 16:26:48,167 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 232 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:26:48,167 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 204 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:26:48,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 756 states. [2022-02-18 16:26:48,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 756 to 502. [2022-02-18 16:26:48,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 3.1277445109780437) internal successors, (1567), 501 states have internal predecessors, (1567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:26:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1567 transitions. [2022-02-18 16:26:48,174 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1567 transitions. Word has length 20 [2022-02-18 16:26:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:26:48,174 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1567 transitions. [2022-02-18 16:26:48,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:26:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1567 transitions. [2022-02-18 16:26:48,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:26:48,175 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:26:48,175 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] [2022-02-18 16:26:48,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-02-18 16:26:48,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:48,376 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:26:48,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:26:48,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1716363863, now seen corresponding path program 17 times [2022-02-18 16:26:48,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:26:48,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061440614] [2022-02-18 16:26:48,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:26:48,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:26:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:26:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:48,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:26:48,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061440614] [2022-02-18 16:26:48,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061440614] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:26:48,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940111061] [2022-02-18 16:26:48,821 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:26:48,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:48,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:26:48,823 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) [2022-02-18 16:26:48,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-02-18 16:26:48,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 16:26:48,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:26:48,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:26:48,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:26:49,264 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 326 treesize of output 286 [2022-02-18 16:26:49,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 279 treesize of output 239 [2022-02-18 16:26:49,525 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 207 [2022-02-18 16:26:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:50,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:26:50,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:26:50,786 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 143 treesize of output 133 [2022-02-18 16:26:50,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 123 [2022-02-18 16:26:51,754 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:51,754 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 612 treesize of output 536 [2022-02-18 16:26:52,548 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:52,548 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 373 treesize of output 321 [2022-02-18 16:26:52,555 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:52,555 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 313 treesize of output 285 [2022-02-18 16:26:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:52,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940111061] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:26:52,666 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:26:52,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:26:52,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821911176] [2022-02-18 16:26:52,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:26:52,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:26:52,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:26:52,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:26:52,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:26:52,667 INFO L87 Difference]: Start difference. First operand 502 states and 1567 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:26:56,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:26:56,727 INFO L93 Difference]: Finished difference Result 789 states and 2380 transitions. [2022-02-18 16:26:56,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-18 16:26:56,727 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:26:56,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:26:56,729 INFO L225 Difference]: With dead ends: 789 [2022-02-18 16:26:56,729 INFO L226 Difference]: Without dead ends: 774 [2022-02-18 16:26:56,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=449, Invalid=2001, Unknown=0, NotChecked=0, Total=2450 [2022-02-18 16:26:56,729 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 170 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 1429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:26:56,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 325 Invalid, 1429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 16:26:56,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2022-02-18 16:26:56,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 505. [2022-02-18 16:26:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 504 states have (on average 3.132936507936508) internal successors, (1579), 504 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) [2022-02-18 16:26:56,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 1579 transitions. [2022-02-18 16:26:56,736 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 1579 transitions. Word has length 20 [2022-02-18 16:26:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:26:56,736 INFO L470 AbstractCegarLoop]: Abstraction has 505 states and 1579 transitions. [2022-02-18 16:26:56,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:26:56,736 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 1579 transitions. [2022-02-18 16:26:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:26:56,737 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:26:56,737 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] [2022-02-18 16:26:56,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-02-18 16:26:56,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:56,938 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:26:56,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:26:56,938 INFO L85 PathProgramCache]: Analyzing trace with hash 31815219, now seen corresponding path program 18 times [2022-02-18 16:26:56,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:26:56,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938465892] [2022-02-18 16:26:56,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:26:56,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:26:56,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:26:57,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:57,290 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:26:57,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938465892] [2022-02-18 16:26:57,290 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938465892] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:26:57,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097964755] [2022-02-18 16:26:57,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:26:57,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:26:57,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:26:57,292 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) [2022-02-18 16:26:57,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-02-18 16:26:57,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-18 16:26:57,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:26:57,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:26:57,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:26:57,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 299 treesize of output 263 [2022-02-18 16:26:58,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 280 [2022-02-18 16:26:58,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 232 [2022-02-18 16:26:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:26:58,565 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:26:58,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:26:59,637 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:26:59,637 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 476 treesize of output 404 [2022-02-18 16:27:00,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:00,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 353 treesize of output 301 [2022-02-18 16:27:00,119 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:00,119 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 293 treesize of output 265 [2022-02-18 16:27:00,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:00,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097964755] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:27:00,572 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:27:00,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:27:00,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112409559] [2022-02-18 16:27:00,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:27:00,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:27:00,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:27:00,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:27:00,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:27:00,573 INFO L87 Difference]: Start difference. First operand 505 states and 1579 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:27:02,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:27:02,361 INFO L93 Difference]: Finished difference Result 648 states and 1972 transitions. [2022-02-18 16:27:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-18 16:27:02,361 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:27:02,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:27:02,362 INFO L225 Difference]: With dead ends: 648 [2022-02-18 16:27:02,362 INFO L226 Difference]: Without dead ends: 633 [2022-02-18 16:27:02,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=234, Invalid=1172, Unknown=0, NotChecked=0, Total=1406 [2022-02-18 16:27:02,362 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 117 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:27:02,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 234 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-18 16:27:02,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-02-18 16:27:02,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 514. [2022-02-18 16:27:02,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.124756335282651) internal successors, (1603), 513 states have internal predecessors, (1603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:27:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1603 transitions. [2022-02-18 16:27:02,369 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1603 transitions. Word has length 20 [2022-02-18 16:27:02,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:27:02,369 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1603 transitions. [2022-02-18 16:27:02,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:27:02,369 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1603 transitions. [2022-02-18 16:27:02,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:27:02,370 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:27:02,370 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] [2022-02-18 16:27:02,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-02-18 16:27:02,583 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,SelfDestructingSolverStorable67 [2022-02-18 16:27:02,583 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:27:02,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:27:02,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1663521945, now seen corresponding path program 19 times [2022-02-18 16:27:02,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:27:02,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089355362] [2022-02-18 16:27:02,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:27:02,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:27:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:27:02,961 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:02,962 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:27:02,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089355362] [2022-02-18 16:27:02,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089355362] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:27:02,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031201868] [2022-02-18 16:27:02,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:27:02,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:02,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:27:02,963 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) [2022-02-18 16:27:02,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-02-18 16:27:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:27:02,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:27:02,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:27:03,365 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 356 treesize of output 320 [2022-02-18 16:27:03,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 304 treesize of output 256 [2022-02-18 16:27:03,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 256 treesize of output 224 [2022-02-18 16:27:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:04,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:27:04,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:27:04,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 133 [2022-02-18 16:27:04,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 123 [2022-02-18 16:27:05,762 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:05,763 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 360 treesize of output 320 [2022-02-18 16:27:06,382 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:06,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 368 treesize of output 340 [2022-02-18 16:27:06,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:06,390 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 280 [2022-02-18 16:27:06,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:06,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031201868] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:27:06,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:27:06,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:27:06,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321147088] [2022-02-18 16:27:06,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:27:06,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:27:06,602 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:27:06,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:27:06,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:27:06,603 INFO L87 Difference]: Start difference. First operand 514 states and 1603 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:27:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:27:09,734 INFO L93 Difference]: Finished difference Result 838 states and 2480 transitions. [2022-02-18 16:27:09,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-18 16:27:09,734 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:27:09,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:27:09,736 INFO L225 Difference]: With dead ends: 838 [2022-02-18 16:27:09,736 INFO L226 Difference]: Without dead ends: 793 [2022-02-18 16:27:09,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=381, Invalid=1875, Unknown=0, NotChecked=0, Total=2256 [2022-02-18 16:27:09,736 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 203 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1263 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:27:09,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 328 Invalid, 1386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1263 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 16:27:09,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-02-18 16:27:09,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 513. [2022-02-18 16:27:09,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 3.115234375) internal successors, (1595), 512 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:27:09,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1595 transitions. [2022-02-18 16:27:09,744 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1595 transitions. Word has length 20 [2022-02-18 16:27:09,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:27:09,744 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 1595 transitions. [2022-02-18 16:27:09,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:27:09,744 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1595 transitions. [2022-02-18 16:27:09,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:27:09,745 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:27:09,745 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] [2022-02-18 16:27:09,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-02-18 16:27:09,945 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,SelfDestructingSolverStorable68 [2022-02-18 16:27:09,945 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:27:09,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:27:09,946 INFO L85 PathProgramCache]: Analyzing trace with hash -694853405, now seen corresponding path program 20 times [2022-02-18 16:27:09,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:27:09,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237658398] [2022-02-18 16:27:09,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:27:09,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:27:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:27:10,231 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:10,231 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:27:10,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237658398] [2022-02-18 16:27:10,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237658398] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:27:10,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083493016] [2022-02-18 16:27:10,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:27:10,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:10,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:27:10,232 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) [2022-02-18 16:27:10,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-02-18 16:27:10,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:27:10,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:27:10,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:27:10,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:27:10,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:27:10,695 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 433 treesize of output 385 [2022-02-18 16:27:11,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:27:11,858 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 290 treesize of output 254 [2022-02-18 16:27:11,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 214 [2022-02-18 16:27:12,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:12,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:27:13,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 132 [2022-02-18 16:27:13,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 184 treesize of output 174 [2022-02-18 16:27:13,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 164 [2022-02-18 16:27:13,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:13,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 315 treesize of output 283 [2022-02-18 16:27:14,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:14,510 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 376 treesize of output 324 [2022-02-18 16:27:14,517 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:14,517 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 316 treesize of output 288 [2022-02-18 16:27:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:14,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083493016] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:27:14,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:27:14,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:27:14,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456101858] [2022-02-18 16:27:14,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:27:14,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:27:14,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:27:14,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:27:14,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:27:14,760 INFO L87 Difference]: Start difference. First operand 513 states and 1595 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) [2022-02-18 16:27:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:27:15,310 INFO L93 Difference]: Finished difference Result 652 states and 1983 transitions. [2022-02-18 16:27:15,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-18 16:27:15,310 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 20 [2022-02-18 16:27:15,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:27:15,311 INFO L225 Difference]: With dead ends: 652 [2022-02-18 16:27:15,311 INFO L226 Difference]: Without dead ends: 637 [2022-02-18 16:27:15,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2022-02-18 16:27:15,312 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 141 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 621 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 246 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 16:27:15,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 209 Invalid, 918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 621 Invalid, 0 Unknown, 246 Unchecked, 0.3s Time] [2022-02-18 16:27:15,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-02-18 16:27:15,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 514. [2022-02-18 16:27:15,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.1189083820662766) internal successors, (1600), 513 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:27:15,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1600 transitions. [2022-02-18 16:27:15,318 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1600 transitions. Word has length 20 [2022-02-18 16:27:15,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:27:15,318 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1600 transitions. [2022-02-18 16:27:15,318 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) [2022-02-18 16:27:15,318 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1600 transitions. [2022-02-18 16:27:15,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:27:15,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:27:15,319 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] [2022-02-18 16:27:15,335 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-02-18 16:27:15,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-02-18 16:27:15,529 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:27:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:27:15,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1476075613, now seen corresponding path program 21 times [2022-02-18 16:27:15,529 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:27:15,529 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165602125] [2022-02-18 16:27:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:27:15,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:27:15,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:27:15,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:15,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:27:15,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165602125] [2022-02-18 16:27:15,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165602125] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:27:15,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218869671] [2022-02-18 16:27:15,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:27:15,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:15,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:27:15,956 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) [2022-02-18 16:27:15,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-02-18 16:27:15,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-18 16:27:15,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:27:15,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:27:15,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:27:16,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 319 treesize of output 275 [2022-02-18 16:27:17,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 271 [2022-02-18 16:27:17,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 271 treesize of output 231 [2022-02-18 16:27:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:17,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:27:17,960 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 113 treesize of output 103 [2022-02-18 16:27:18,733 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:18,734 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 306 treesize of output 270 [2022-02-18 16:27:19,225 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:19,225 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 353 treesize of output 301 [2022-02-18 16:27:19,232 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:19,232 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 293 treesize of output 265 [2022-02-18 16:27:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:19,439 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218869671] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:27:19,439 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:27:19,439 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:27:19,439 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996547788] [2022-02-18 16:27:19,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:27:19,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:27:19,440 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:27:19,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:27:19,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:27:19,440 INFO L87 Difference]: Start difference. First operand 514 states and 1600 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:27:21,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:27:21,395 INFO L93 Difference]: Finished difference Result 689 states and 2080 transitions. [2022-02-18 16:27:21,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-18 16:27:21,396 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:27:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:27:21,397 INFO L225 Difference]: With dead ends: 689 [2022-02-18 16:27:21,397 INFO L226 Difference]: Without dead ends: 674 [2022-02-18 16:27:21,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=243, Invalid=1317, Unknown=0, NotChecked=0, Total=1560 [2022-02-18 16:27:21,397 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 155 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 1072 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 1148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 1072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 16:27:21,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 256 Invalid, 1148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 1072 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-18 16:27:21,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2022-02-18 16:27:21,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 516. [2022-02-18 16:27:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 3.116504854368932) internal successors, (1605), 515 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:27:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 1605 transitions. [2022-02-18 16:27:21,404 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 1605 transitions. Word has length 20 [2022-02-18 16:27:21,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:27:21,405 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 1605 transitions. [2022-02-18 16:27:21,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:27:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 1605 transitions. [2022-02-18 16:27:21,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:27:21,406 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:27:21,406 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] [2022-02-18 16:27:21,424 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-02-18 16:27:21,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:21,607 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:27:21,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:27:21,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1375862031, now seen corresponding path program 22 times [2022-02-18 16:27:21,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:27:21,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756103660] [2022-02-18 16:27:21,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:27:21,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:27:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:27:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:21,871 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:27:21,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756103660] [2022-02-18 16:27:21,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756103660] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:27:21,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432078214] [2022-02-18 16:27:21,871 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:27:21,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:21,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:27:21,872 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) [2022-02-18 16:27:21,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-02-18 16:27:21,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:27:21,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:27:21,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:27:21,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:27:22,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 200 [2022-02-18 16:27:22,663 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:27:22,664 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 375 treesize of output 319 [2022-02-18 16:27:22,667 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:27:22,667 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 319 treesize of output 283 [2022-02-18 16:27:23,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:23,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:27:23,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:27:24,189 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:24,189 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 526 treesize of output 450 [2022-02-18 16:27:24,628 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:24,628 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 353 treesize of output 301 [2022-02-18 16:27:24,635 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:24,635 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 293 treesize of output 265 [2022-02-18 16:27:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:24,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432078214] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:27:24,803 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:27:24,803 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:27:24,803 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859608128] [2022-02-18 16:27:24,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:27:24,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:27:24,803 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:27:24,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:27:24,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:27:24,803 INFO L87 Difference]: Start difference. First operand 516 states and 1605 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) [2022-02-18 16:27:25,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:27:25,442 INFO L93 Difference]: Finished difference Result 626 states and 1907 transitions. [2022-02-18 16:27:25,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-18 16:27:25,442 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 20 [2022-02-18 16:27:25,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:27:25,443 INFO L225 Difference]: With dead ends: 626 [2022-02-18 16:27:25,443 INFO L226 Difference]: Without dead ends: 611 [2022-02-18 16:27:25,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2022-02-18 16:27:25,444 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 80 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 16:27:25,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 151 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-18 16:27:25,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2022-02-18 16:27:25,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 519. [2022-02-18 16:27:25,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 3.113899613899614) internal successors, (1613), 518 states have internal predecessors, (1613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:27:25,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 1613 transitions. [2022-02-18 16:27:25,450 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 1613 transitions. Word has length 20 [2022-02-18 16:27:25,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:27:25,450 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 1613 transitions. [2022-02-18 16:27:25,451 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) [2022-02-18 16:27:25,451 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 1613 transitions. [2022-02-18 16:27:25,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:27:25,451 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:27:25,451 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] [2022-02-18 16:27:25,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-02-18 16:27:25,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:25,652 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:27:25,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:27:25,652 INFO L85 PathProgramCache]: Analyzing trace with hash -725900325, now seen corresponding path program 23 times [2022-02-18 16:27:25,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:27:25,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823551040] [2022-02-18 16:27:25,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:27:25,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:27:25,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:27:25,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:25,971 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:27:25,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823551040] [2022-02-18 16:27:25,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823551040] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:27:25,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825579506] [2022-02-18 16:27:25,972 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:27:25,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:25,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:27:25,973 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) [2022-02-18 16:27:25,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-02-18 16:27:26,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:27:26,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:27:26,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:27:26,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:27:26,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 238 treesize of output 202 [2022-02-18 16:27:26,688 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 272 treesize of output 232 [2022-02-18 16:27:26,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 232 treesize of output 208 [2022-02-18 16:27:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:27,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:27:27,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:27:28,077 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:28,077 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 277 treesize of output 245 [2022-02-18 16:27:28,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:28,566 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 350 treesize of output 298 [2022-02-18 16:27:28,573 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:28,573 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 290 treesize of output 262 [2022-02-18 16:27:28,706 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:28,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825579506] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:27:28,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:27:28,707 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:27:28,707 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133187903] [2022-02-18 16:27:28,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:27:28,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:27:28,707 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:27:28,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:27:28,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:27:28,707 INFO L87 Difference]: Start difference. First operand 519 states and 1613 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:27:29,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:27:29,540 INFO L93 Difference]: Finished difference Result 630 states and 1917 transitions. [2022-02-18 16:27:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-18 16:27:29,540 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:27:29,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:27:29,541 INFO L225 Difference]: With dead ends: 630 [2022-02-18 16:27:29,541 INFO L226 Difference]: Without dead ends: 615 [2022-02-18 16:27:29,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=188, Invalid=934, Unknown=0, NotChecked=0, Total=1122 [2022-02-18 16:27:29,541 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 120 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 940 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:27:29,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 217 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 940 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:27:29,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2022-02-18 16:27:29,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 522. [2022-02-18 16:27:29,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 521 states have (on average 3.111324376199616) internal successors, (1621), 521 states have internal predecessors, (1621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:27:29,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 1621 transitions. [2022-02-18 16:27:29,548 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 1621 transitions. Word has length 20 [2022-02-18 16:27:29,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:27:29,548 INFO L470 AbstractCegarLoop]: Abstraction has 522 states and 1621 transitions. [2022-02-18 16:27:29,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:27:29,548 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 1621 transitions. [2022-02-18 16:27:29,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:27:29,549 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:27:29,549 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] [2022-02-18 16:27:29,565 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-02-18 16:27:29,749 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,SelfDestructingSolverStorable72 [2022-02-18 16:27:29,749 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:27:29,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:27:29,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1688017721, now seen corresponding path program 24 times [2022-02-18 16:27:29,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:27:29,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158062871] [2022-02-18 16:27:29,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:27:29,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:27:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:27:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:29,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:27:29,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158062871] [2022-02-18 16:27:29,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158062871] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:27:29,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168237207] [2022-02-18 16:27:29,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:27:29,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:29,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:27:29,984 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) [2022-02-18 16:27:29,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-02-18 16:27:30,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-18 16:27:30,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:27:30,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:27:30,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:27:30,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:27:30,491 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 359 treesize of output 319 [2022-02-18 16:27:31,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:27:31,182 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 267 [2022-02-18 16:27:31,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 267 treesize of output 227 [2022-02-18 16:27:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:31,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:27:31,843 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 113 treesize of output 103 [2022-02-18 16:27:32,594 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:32,594 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 297 treesize of output 261 [2022-02-18 16:27:33,016 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:33,016 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 353 treesize of output 301 [2022-02-18 16:27:33,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:33,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 293 treesize of output 265 [2022-02-18 16:27:33,244 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:33,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168237207] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:27:33,244 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:27:33,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:27:33,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927780173] [2022-02-18 16:27:33,244 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:27:33,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:27:33,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:27:33,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:27:33,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:27:33,245 INFO L87 Difference]: Start difference. First operand 522 states and 1621 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) [2022-02-18 16:27:33,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:27:33,567 INFO L93 Difference]: Finished difference Result 624 states and 1915 transitions. [2022-02-18 16:27:33,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-18 16:27:33,567 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 20 [2022-02-18 16:27:33,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:27:33,568 INFO L225 Difference]: With dead ends: 624 [2022-02-18 16:27:33,568 INFO L226 Difference]: Without dead ends: 609 [2022-02-18 16:27:33,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:27:33,569 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 96 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-18 16:27:33,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 126 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 470 Invalid, 0 Unknown, 8 Unchecked, 0.2s Time] [2022-02-18 16:27:33,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 609 states. [2022-02-18 16:27:33,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 609 to 526. [2022-02-18 16:27:33,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 525 states have (on average 3.1142857142857143) internal successors, (1635), 525 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:27:33,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 1635 transitions. [2022-02-18 16:27:33,575 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 1635 transitions. Word has length 20 [2022-02-18 16:27:33,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:27:33,575 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 1635 transitions. [2022-02-18 16:27:33,575 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) [2022-02-18 16:27:33,576 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 1635 transitions. [2022-02-18 16:27:33,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:27:33,576 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:27:33,576 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] [2022-02-18 16:27:33,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-02-18 16:27:33,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:33,777 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:27:33,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:27:33,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1675656099, now seen corresponding path program 25 times [2022-02-18 16:27:33,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:27:33,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680403779] [2022-02-18 16:27:33,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:27:33,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:27:33,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:27:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:34,002 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:27:34,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680403779] [2022-02-18 16:27:34,002 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680403779] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:27:34,002 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273087950] [2022-02-18 16:27:34,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:27:34,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:34,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:27:34,003 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) [2022-02-18 16:27:34,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-02-18 16:27:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:27:34,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:27:34,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:27:34,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:27:34,353 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 332 treesize of output 296 [2022-02-18 16:27:35,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:27:35,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 264 [2022-02-18 16:27:35,337 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 264 treesize of output 232 [2022-02-18 16:27:35,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:35,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:27:36,022 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 113 treesize of output 103 [2022-02-18 16:27:36,764 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:36,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 297 treesize of output 261 [2022-02-18 16:27:37,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:37,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 353 treesize of output 301 [2022-02-18 16:27:37,199 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:37,199 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 293 treesize of output 265 [2022-02-18 16:27:37,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:37,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273087950] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:27:37,380 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:27:37,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:27:37,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225203371] [2022-02-18 16:27:37,380 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:27:37,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:27:37,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:27:37,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:27:37,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:27:37,381 INFO L87 Difference]: Start difference. First operand 526 states and 1635 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) [2022-02-18 16:27:37,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:27:37,937 INFO L93 Difference]: Finished difference Result 639 states and 1954 transitions. [2022-02-18 16:27:37,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-18 16:27:37,937 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 20 [2022-02-18 16:27:37,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:27:37,938 INFO L225 Difference]: With dead ends: 639 [2022-02-18 16:27:37,938 INFO L226 Difference]: Without dead ends: 632 [2022-02-18 16:27:37,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2022-02-18 16:27:37,938 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 75 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 16:27:37,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 237 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 747 Invalid, 0 Unknown, 206 Unchecked, 0.3s Time] [2022-02-18 16:27:37,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-02-18 16:27:37,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 527. [2022-02-18 16:27:37,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 3.1159695817490496) internal successors, (1639), 526 states have internal predecessors, (1639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:27:37,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1639 transitions. [2022-02-18 16:27:37,945 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1639 transitions. Word has length 20 [2022-02-18 16:27:37,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:27:37,945 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 1639 transitions. [2022-02-18 16:27:37,945 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) [2022-02-18 16:27:37,945 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1639 transitions. [2022-02-18 16:27:37,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:27:37,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:27:37,946 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] [2022-02-18 16:27:37,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-02-18 16:27:38,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:38,159 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:27:38,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:27:38,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1610948069, now seen corresponding path program 26 times [2022-02-18 16:27:38,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:27:38,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529256590] [2022-02-18 16:27:38,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:27:38,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:27:38,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:27:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:38,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:27:38,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529256590] [2022-02-18 16:27:38,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529256590] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:27:38,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078033764] [2022-02-18 16:27:38,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:27:38,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:38,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:27:38,510 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) [2022-02-18 16:27:38,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-02-18 16:27:38,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:27:38,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:27:38,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:27:38,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:27:38,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 271 treesize of output 235 [2022-02-18 16:27:39,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 225 [2022-02-18 16:27:39,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 197 [2022-02-18 16:27:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:39,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:27:39,896 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:27:40,649 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:40,650 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 273 treesize of output 241 [2022-02-18 16:27:41,018 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:41,018 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 353 treesize of output 301 [2022-02-18 16:27:41,025 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:41,026 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 293 treesize of output 265 [2022-02-18 16:27:41,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:41,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078033764] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:27:41,280 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:27:41,280 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:27:41,280 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223496471] [2022-02-18 16:27:41,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:27:41,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:27:41,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:27:41,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:27:41,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:27:41,281 INFO L87 Difference]: Start difference. First operand 527 states and 1639 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:27:42,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:27:42,350 INFO L93 Difference]: Finished difference Result 685 states and 2051 transitions. [2022-02-18 16:27:42,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-18 16:27:42,351 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:27:42,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:27:42,352 INFO L225 Difference]: With dead ends: 685 [2022-02-18 16:27:42,352 INFO L226 Difference]: Without dead ends: 670 [2022-02-18 16:27:42,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=169, Invalid=887, Unknown=0, NotChecked=0, Total=1056 [2022-02-18 16:27:42,352 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 158 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:27:42,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 209 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:27:42,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2022-02-18 16:27:42,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 514. [2022-02-18 16:27:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.1130604288499026) internal successors, (1597), 513 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:27:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1597 transitions. [2022-02-18 16:27:42,359 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1597 transitions. Word has length 20 [2022-02-18 16:27:42,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:27:42,359 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1597 transitions. [2022-02-18 16:27:42,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:27:42,359 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1597 transitions. [2022-02-18 16:27:42,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:27:42,360 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:27:42,360 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] [2022-02-18 16:27:42,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-02-18 16:27:42,567 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,SelfDestructingSolverStorable75 [2022-02-18 16:27:42,568 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:27:42,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:27:42,568 INFO L85 PathProgramCache]: Analyzing trace with hash -107265587, now seen corresponding path program 27 times [2022-02-18 16:27:42,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:27:42,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454069189] [2022-02-18 16:27:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:27:42,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:27:42,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:27:42,865 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:42,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:27:42,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454069189] [2022-02-18 16:27:42,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454069189] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:27:42,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379339408] [2022-02-18 16:27:42,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:27:42,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:42,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:27:42,866 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) [2022-02-18 16:27:42,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-02-18 16:27:42,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 16:27:42,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:27:42,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:27:42,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:27:43,309 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 238 treesize of output 202 [2022-02-18 16:27:43,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 268 [2022-02-18 16:27:43,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 268 treesize of output 232 [2022-02-18 16:27:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:44,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:27:44,264 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 113 treesize of output 103 [2022-02-18 16:27:44,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:44,879 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 528 treesize of output 452 [2022-02-18 16:27:45,364 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:45,364 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 353 treesize of output 301 [2022-02-18 16:27:45,371 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:45,371 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 293 treesize of output 265 [2022-02-18 16:27:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:45,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379339408] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:27:45,522 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:27:45,522 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:27:45,522 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065028095] [2022-02-18 16:27:45,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:27:45,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:27:45,523 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:27:45,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:27:45,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:27:45,523 INFO L87 Difference]: Start difference. First operand 514 states and 1597 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:27:47,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:27:47,712 INFO L93 Difference]: Finished difference Result 691 states and 2105 transitions. [2022-02-18 16:27:47,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-18 16:27:47,712 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:27:47,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:27:47,713 INFO L225 Difference]: With dead ends: 691 [2022-02-18 16:27:47,713 INFO L226 Difference]: Without dead ends: 676 [2022-02-18 16:27:47,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=371, Invalid=1791, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 16:27:47,714 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 114 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 1302 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 16:27:47,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 300 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1302 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-18 16:27:47,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-02-18 16:27:47,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 517. [2022-02-18 16:27:47,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 516 states have (on average 3.11046511627907) internal successors, (1605), 516 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:27:47,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 1605 transitions. [2022-02-18 16:27:47,720 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 1605 transitions. Word has length 20 [2022-02-18 16:27:47,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:27:47,720 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 1605 transitions. [2022-02-18 16:27:47,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:27:47,720 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 1605 transitions. [2022-02-18 16:27:47,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:27:47,721 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:27:47,721 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] [2022-02-18 16:27:47,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-02-18 16:27:47,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:47,922 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:27:47,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:27:47,922 INFO L85 PathProgramCache]: Analyzing trace with hash -109891363, now seen corresponding path program 28 times [2022-02-18 16:27:47,922 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:27:47,922 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548169157] [2022-02-18 16:27:47,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:27:47,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:27:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:27:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:48,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:27:48,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548169157] [2022-02-18 16:27:48,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548169157] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:27:48,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33557662] [2022-02-18 16:27:48,233 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:27:48,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:48,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:27:48,234 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) [2022-02-18 16:27:48,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-02-18 16:27:48,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:27:48,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:27:48,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:27:48,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:27:48,765 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 258 treesize of output 214 [2022-02-18 16:27:49,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 393 treesize of output 337 [2022-02-18 16:27:49,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 337 treesize of output 297 [2022-02-18 16:27:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:49,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:27:49,886 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 113 treesize of output 103 [2022-02-18 16:27:50,529 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:50,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 360 treesize of output 316 [2022-02-18 16:27:51,089 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:51,089 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 353 treesize of output 301 [2022-02-18 16:27:51,096 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:51,096 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 293 treesize of output 265 [2022-02-18 16:27:51,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:51,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33557662] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:27:51,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:27:51,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:27:51,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012750006] [2022-02-18 16:27:51,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:27:51,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:27:51,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:27:51,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:27:51,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:27:51,354 INFO L87 Difference]: Start difference. First operand 517 states and 1605 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:27:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:27:54,124 INFO L93 Difference]: Finished difference Result 726 states and 2193 transitions. [2022-02-18 16:27:54,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-18 16:27:54,126 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:27:54,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:27:54,127 INFO L225 Difference]: With dead ends: 726 [2022-02-18 16:27:54,127 INFO L226 Difference]: Without dead ends: 711 [2022-02-18 16:27:54,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=424, Invalid=2026, Unknown=0, NotChecked=0, Total=2450 [2022-02-18 16:27:54,127 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 133 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 16:27:54,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 293 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-18 16:27:54,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2022-02-18 16:27:54,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 514. [2022-02-18 16:27:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 3.1130604288499026) internal successors, (1597), 513 states have internal predecessors, (1597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:27:54,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 1597 transitions. [2022-02-18 16:27:54,134 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 1597 transitions. Word has length 20 [2022-02-18 16:27:54,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:27:54,134 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 1597 transitions. [2022-02-18 16:27:54,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:27:54,134 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 1597 transitions. [2022-02-18 16:27:54,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:27:54,135 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:27:54,135 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] [2022-02-18 16:27:54,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-02-18 16:27:54,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-02-18 16:27:54,335 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:27:54,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:27:54,335 INFO L85 PathProgramCache]: Analyzing trace with hash 881370417, now seen corresponding path program 29 times [2022-02-18 16:27:54,336 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:27:54,336 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429091706] [2022-02-18 16:27:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:27:54,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:27:54,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:27:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:54,835 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:27:54,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429091706] [2022-02-18 16:27:54,835 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429091706] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:27:54,835 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36866186] [2022-02-18 16:27:54,835 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:27:54,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:27:54,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:27:54,836 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) [2022-02-18 16:27:54,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-02-18 16:27:54,865 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:27:54,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:27:54,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:27:54,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:27:55,081 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 299 treesize of output 259 [2022-02-18 16:27:55,874 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 270 [2022-02-18 16:27:55,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 270 treesize of output 246 [2022-02-18 16:27:56,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:56,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:27:56,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:27:57,866 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:27:57,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-02-18 16:27:58,221 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:58,221 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 453 treesize of output 397 [2022-02-18 16:27:58,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:58,715 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 288 treesize of output 256 [2022-02-18 16:27:58,721 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:27:58,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 248 treesize of output 220 [2022-02-18 16:27:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:27:58,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36866186] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:27:58,845 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:27:58,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:27:58,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219528348] [2022-02-18 16:27:58,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:27:58,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:27:58,845 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:27:58,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:27:58,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:27:58,845 INFO L87 Difference]: Start difference. First operand 514 states and 1597 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:28:09,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:28:09,511 INFO L93 Difference]: Finished difference Result 1077 states and 3129 transitions. [2022-02-18 16:28:09,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-18 16:28:09,511 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:28:09,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:28:09,513 INFO L225 Difference]: With dead ends: 1077 [2022-02-18 16:28:09,513 INFO L226 Difference]: Without dead ends: 1017 [2022-02-18 16:28:09,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=833, Invalid=3859, Unknown=0, NotChecked=0, Total=4692 [2022-02-18 16:28:09,514 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 266 mSDsluCounter, 858 mSDsCounter, 0 mSdLazyCounter, 1772 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:28:09,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 476 Invalid, 1967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1772 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-18 16:28:09,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-02-18 16:28:09,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 523. [2022-02-18 16:28:09,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 522 states have (on average 3.111111111111111) internal successors, (1624), 522 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:28:09,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 1624 transitions. [2022-02-18 16:28:09,522 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 1624 transitions. Word has length 20 [2022-02-18 16:28:09,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:28:09,522 INFO L470 AbstractCegarLoop]: Abstraction has 523 states and 1624 transitions. [2022-02-18 16:28:09,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:28:09,522 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 1624 transitions. [2022-02-18 16:28:09,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:28:09,523 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:28:09,523 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] [2022-02-18 16:28:09,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-02-18 16:28:09,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:09,755 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:28:09,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:28:09,756 INFO L85 PathProgramCache]: Analyzing trace with hash 844275969, now seen corresponding path program 30 times [2022-02-18 16:28:09,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:28:09,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620288522] [2022-02-18 16:28:09,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:28:09,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:28:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:28:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:10,040 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:28:10,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620288522] [2022-02-18 16:28:10,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620288522] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:28:10,040 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639916771] [2022-02-18 16:28:10,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:28:10,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:10,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:28:10,042 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) [2022-02-18 16:28:10,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-02-18 16:28:10,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 16:28:10,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:28:10,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-18 16:28:10,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:28:10,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 275 treesize of output 243 [2022-02-18 16:28:10,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 390 treesize of output 326 [2022-02-18 16:28:10,787 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 326 treesize of output 286 [2022-02-18 16:28:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:11,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:28:11,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 105 [2022-02-18 16:28:12,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:12,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 514 treesize of output 466 [2022-02-18 16:28:15,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:28:15,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-02-18 16:28:15,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:15,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 380 treesize of output 340 [2022-02-18 16:28:15,774 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:15,775 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 332 treesize of output 288 [2022-02-18 16:28:16,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:16,217 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639916771] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:28:16,217 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:28:16,217 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:28:16,217 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586124901] [2022-02-18 16:28:16,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:28:16,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:28:16,217 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:28:16,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:28:16,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:28:16,218 INFO L87 Difference]: Start difference. First operand 523 states and 1624 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:28:20,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:28:20,777 INFO L93 Difference]: Finished difference Result 1003 states and 2985 transitions. [2022-02-18 16:28:20,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-18 16:28:20,778 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 20 [2022-02-18 16:28:20,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:28:20,779 INFO L225 Difference]: With dead ends: 1003 [2022-02-18 16:28:20,779 INFO L226 Difference]: Without dead ends: 943 [2022-02-18 16:28:20,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=557, Invalid=2865, Unknown=0, NotChecked=0, Total=3422 [2022-02-18 16:28:20,780 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 177 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-18 16:28:20,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 486 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1693 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-18 16:28:20,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2022-02-18 16:28:20,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 536. [2022-02-18 16:28:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 3.130841121495327) internal successors, (1675), 535 states have internal predecessors, (1675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:28:20,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1675 transitions. [2022-02-18 16:28:20,788 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1675 transitions. Word has length 20 [2022-02-18 16:28:20,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:28:20,788 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 1675 transitions. [2022-02-18 16:28:20,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:28:20,788 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1675 transitions. [2022-02-18 16:28:20,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:28:20,789 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:28:20,789 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] [2022-02-18 16:28:20,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-02-18 16:28:20,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2022-02-18 16:28:20,989 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:28:20,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:28:20,990 INFO L85 PathProgramCache]: Analyzing trace with hash 721454265, now seen corresponding path program 31 times [2022-02-18 16:28:20,990 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:28:20,990 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621331526] [2022-02-18 16:28:20,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:28:20,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:28:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:28:21,275 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:21,275 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:28:21,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621331526] [2022-02-18 16:28:21,275 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621331526] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:28:21,275 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692179160] [2022-02-18 16:28:21,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:28:21,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:21,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:28:21,276 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) [2022-02-18 16:28:21,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-02-18 16:28:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:28:21,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:28:21,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:28:21,614 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 274 treesize of output 234 [2022-02-18 16:28:21,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:28:21,952 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 379 treesize of output 323 [2022-02-18 16:28:21,955 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:28:21,955 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 323 treesize of output 283 [2022-02-18 16:28:22,618 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:22,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:28:22,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:28:23,235 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 141 treesize of output 131 [2022-02-18 16:28:23,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 121 [2022-02-18 16:28:23,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:23,910 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 456 treesize of output 416 [2022-02-18 16:28:24,532 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:24,532 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 359 treesize of output 315 [2022-02-18 16:28:24,539 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:24,540 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 324 treesize of output 288 [2022-02-18 16:28:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:24,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692179160] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:28:24,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:28:24,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:28:24,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605311331] [2022-02-18 16:28:24,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:28:24,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:28:24,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:28:24,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:28:24,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:28:24,823 INFO L87 Difference]: Start difference. First operand 536 states and 1675 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) [2022-02-18 16:28:25,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:28:25,600 INFO L93 Difference]: Finished difference Result 658 states and 2017 transitions. [2022-02-18 16:28:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-18 16:28:25,600 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 20 [2022-02-18 16:28:25,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:28:25,601 INFO L225 Difference]: With dead ends: 658 [2022-02-18 16:28:25,601 INFO L226 Difference]: Without dead ends: 643 [2022-02-18 16:28:25,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2022-02-18 16:28:25,601 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 62 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:28:25,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 187 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:28:25,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-02-18 16:28:25,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 534. [2022-02-18 16:28:25,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 3.1294559099437147) internal successors, (1668), 533 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:28:25,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1668 transitions. [2022-02-18 16:28:25,608 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1668 transitions. Word has length 20 [2022-02-18 16:28:25,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:28:25,608 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 1668 transitions. [2022-02-18 16:28:25,608 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) [2022-02-18 16:28:25,608 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1668 transitions. [2022-02-18 16:28:25,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:28:25,609 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:28:25,609 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] [2022-02-18 16:28:25,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-02-18 16:28:25,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:25,809 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:28:25,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:28:25,810 INFO L85 PathProgramCache]: Analyzing trace with hash 966124865, now seen corresponding path program 32 times [2022-02-18 16:28:25,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:28:25,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523381640] [2022-02-18 16:28:25,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:28:25,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:28:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:28:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:26,226 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:28:26,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523381640] [2022-02-18 16:28:26,226 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523381640] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:28:26,226 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892939932] [2022-02-18 16:28:26,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:28:26,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:26,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:28:26,227 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) [2022-02-18 16:28:26,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-02-18 16:28:26,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:28:26,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:28:26,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:28:26,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:28:26,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 341 treesize of output 301 [2022-02-18 16:28:26,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 332 treesize of output 280 [2022-02-18 16:28:26,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 280 treesize of output 248 [2022-02-18 16:28:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:27,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:28:27,875 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 113 treesize of output 103 [2022-02-18 16:28:28,207 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 143 treesize of output 133 [2022-02-18 16:28:28,209 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 133 treesize of output 123 [2022-02-18 16:28:29,048 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:29,049 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 508 treesize of output 436 [2022-02-18 16:28:29,476 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:29,476 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 378 treesize of output 350 [2022-02-18 16:28:29,483 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:29,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 342 treesize of output 290 [2022-02-18 16:28:29,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:29,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892939932] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:28:29,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:28:29,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:28:29,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463106732] [2022-02-18 16:28:29,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:28:29,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:28:29,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:28:29,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:28:29,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:28:29,726 INFO L87 Difference]: Start difference. First operand 534 states and 1668 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:28:32,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:28:32,821 INFO L93 Difference]: Finished difference Result 840 states and 2542 transitions. [2022-02-18 16:28:32,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-18 16:28:32,821 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:28:32,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:28:32,823 INFO L225 Difference]: With dead ends: 840 [2022-02-18 16:28:32,823 INFO L226 Difference]: Without dead ends: 825 [2022-02-18 16:28:32,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=440, Invalid=1912, Unknown=0, NotChecked=0, Total=2352 [2022-02-18 16:28:32,823 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 100 mSDsluCounter, 773 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:28:32,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 366 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 16:28:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 825 states. [2022-02-18 16:28:32,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 825 to 537. [2022-02-18 16:28:32,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 536 states have (on average 3.1343283582089554) internal successors, (1680), 536 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:28:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1680 transitions. [2022-02-18 16:28:32,830 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1680 transitions. Word has length 20 [2022-02-18 16:28:32,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:28:32,830 INFO L470 AbstractCegarLoop]: Abstraction has 537 states and 1680 transitions. [2022-02-18 16:28:32,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:28:32,830 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1680 transitions. [2022-02-18 16:28:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:28:32,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:28:32,831 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] [2022-02-18 16:28:32,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-02-18 16:28:33,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:33,032 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:28:33,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:28:33,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1580663349, now seen corresponding path program 33 times [2022-02-18 16:28:33,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:28:33,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576992922] [2022-02-18 16:28:33,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:28:33,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:28:33,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:28:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:33,277 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:28:33,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576992922] [2022-02-18 16:28:33,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576992922] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:28:33,277 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026928275] [2022-02-18 16:28:33,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:28:33,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:33,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:28:33,278 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) [2022-02-18 16:28:33,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-02-18 16:28:33,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-18 16:28:33,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:28:33,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:28:33,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:28:33,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 299 treesize of output 255 [2022-02-18 16:28:34,377 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 311 treesize of output 267 [2022-02-18 16:28:34,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 267 treesize of output 235 [2022-02-18 16:28:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:34,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:28:35,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:28:35,913 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:35,913 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 476 treesize of output 404 [2022-02-18 16:28:36,316 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:36,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 356 treesize of output 304 [2022-02-18 16:28:36,324 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:36,324 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 296 treesize of output 268 [2022-02-18 16:28:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:36,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026928275] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:28:36,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:28:36,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:28:36,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155106844] [2022-02-18 16:28:36,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:28:36,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:28:36,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:28:36,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:28:36,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:28:36,530 INFO L87 Difference]: Start difference. First operand 537 states and 1680 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:28:38,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:28:38,449 INFO L93 Difference]: Finished difference Result 670 states and 2056 transitions. [2022-02-18 16:28:38,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-18 16:28:38,449 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:28:38,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:28:38,450 INFO L225 Difference]: With dead ends: 670 [2022-02-18 16:28:38,450 INFO L226 Difference]: Without dead ends: 655 [2022-02-18 16:28:38,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=244, Invalid=1238, Unknown=0, NotChecked=0, Total=1482 [2022-02-18 16:28:38,451 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 96 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 1225 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 16:28:38,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 303 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1225 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-18 16:28:38,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-02-18 16:28:38,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 534. [2022-02-18 16:28:38,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 533 states have (on average 3.1294559099437147) internal successors, (1668), 533 states have internal predecessors, (1668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:28:38,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 1668 transitions. [2022-02-18 16:28:38,457 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 1668 transitions. Word has length 20 [2022-02-18 16:28:38,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:28:38,457 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 1668 transitions. [2022-02-18 16:28:38,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:28:38,457 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 1668 transitions. [2022-02-18 16:28:38,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:28:38,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:28:38,458 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] [2022-02-18 16:28:38,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-02-18 16:28:38,658 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,SelfDestructingSolverStorable82 [2022-02-18 16:28:38,659 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:28:38,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:28:38,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1306626697, now seen corresponding path program 34 times [2022-02-18 16:28:38,659 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:28:38,659 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008829861] [2022-02-18 16:28:38,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:28:38,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:28:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:28:39,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:39,015 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:28:39,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008829861] [2022-02-18 16:28:39,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008829861] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:28:39,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806585659] [2022-02-18 16:28:39,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:28:39,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:39,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:28:39,016 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) [2022-02-18 16:28:39,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-02-18 16:28:39,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:28:39,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:28:39,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:28:39,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:28:39,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:28:39,488 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 373 treesize of output 333 [2022-02-18 16:28:40,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 316 treesize of output 272 [2022-02-18 16:28:40,051 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:28:40,051 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 272 treesize of output 232 [2022-02-18 16:28:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:40,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:28:40,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:28:41,490 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:41,490 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 477 treesize of output 405 [2022-02-18 16:28:41,908 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:41,908 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 356 treesize of output 304 [2022-02-18 16:28:41,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:41,915 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 296 treesize of output 268 [2022-02-18 16:28:42,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:42,182 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806585659] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:28:42,183 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:28:42,183 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-18 16:28:42,183 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158056102] [2022-02-18 16:28:42,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:28:42,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-18 16:28:42,183 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:28:42,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-18 16:28:42,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-18 16:28:42,183 INFO L87 Difference]: Start difference. First operand 534 states and 1668 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) [2022-02-18 16:28:42,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:28:42,697 INFO L93 Difference]: Finished difference Result 621 states and 1910 transitions. [2022-02-18 16:28:42,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-18 16:28:42,697 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 20 [2022-02-18 16:28:42,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:28:42,698 INFO L225 Difference]: With dead ends: 621 [2022-02-18 16:28:42,698 INFO L226 Difference]: Without dead ends: 606 [2022-02-18 16:28:42,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:28:42,699 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 36 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:28:42,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 189 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 786 Invalid, 0 Unknown, 115 Unchecked, 0.4s Time] [2022-02-18 16:28:42,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2022-02-18 16:28:42,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 540. [2022-02-18 16:28:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 3.1298701298701297) internal successors, (1687), 539 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:28:42,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1687 transitions. [2022-02-18 16:28:42,705 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1687 transitions. Word has length 20 [2022-02-18 16:28:42,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:28:42,705 INFO L470 AbstractCegarLoop]: Abstraction has 540 states and 1687 transitions. [2022-02-18 16:28:42,705 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) [2022-02-18 16:28:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1687 transitions. [2022-02-18 16:28:42,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:28:42,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:28:42,706 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] [2022-02-18 16:28:42,722 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-02-18 16:28:42,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:42,907 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:28:42,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:28:42,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2063703189, now seen corresponding path program 35 times [2022-02-18 16:28:42,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:28:42,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82782236] [2022-02-18 16:28:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:28:42,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:28:42,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:28:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:43,130 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:28:43,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82782236] [2022-02-18 16:28:43,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82782236] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:28:43,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347808151] [2022-02-18 16:28:43,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:28:43,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:43,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:28:43,131 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) [2022-02-18 16:28:43,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-02-18 16:28:43,159 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:28:43,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:28:43,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:28:43,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:28:43,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 304 treesize of output 264 [2022-02-18 16:28:44,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 368 treesize of output 328 [2022-02-18 16:28:44,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 328 treesize of output 272 [2022-02-18 16:28:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:44,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:28:45,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 218 treesize of output 208 [2022-02-18 16:28:45,939 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:45,939 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 654 treesize of output 562 [2022-02-18 16:28:46,566 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 119 treesize of output 113 [2022-02-18 16:28:46,568 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 107 [2022-02-18 16:28:46,868 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:46,869 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 474 treesize of output 434 [2022-02-18 16:28:46,876 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:46,876 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 426 treesize of output 358 [2022-02-18 16:28:47,250 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:47,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347808151] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:28:47,251 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:28:47,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-18 16:28:47,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831802970] [2022-02-18 16:28:47,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:28:47,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-18 16:28:47,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:28:47,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-18 16:28:47,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2022-02-18 16:28:47,251 INFO L87 Difference]: Start difference. First operand 540 states and 1687 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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) [2022-02-18 16:28:49,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:28:49,855 INFO L93 Difference]: Finished difference Result 837 states and 2500 transitions. [2022-02-18 16:28:49,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-18 16:28:49,855 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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 20 [2022-02-18 16:28:49,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:28:49,856 INFO L225 Difference]: With dead ends: 837 [2022-02-18 16:28:49,856 INFO L226 Difference]: Without dead ends: 777 [2022-02-18 16:28:49,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=266, Invalid=1540, Unknown=0, NotChecked=0, Total=1806 [2022-02-18 16:28:49,857 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 125 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 1137 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 1197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 16:28:49,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 356 Invalid, 1197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1137 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-18 16:28:49,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-02-18 16:28:49,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 562. [2022-02-18 16:28:49,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 562 states, 561 states have (on average 3.1140819964349378) internal successors, (1747), 561 states have internal predecessors, (1747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:28:49,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 1747 transitions. [2022-02-18 16:28:49,864 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 1747 transitions. Word has length 20 [2022-02-18 16:28:49,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:28:49,864 INFO L470 AbstractCegarLoop]: Abstraction has 562 states and 1747 transitions. [2022-02-18 16:28:49,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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) [2022-02-18 16:28:49,864 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 1747 transitions. [2022-02-18 16:28:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:28:49,865 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:28:49,865 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] [2022-02-18 16:28:49,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-02-18 16:28:50,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:50,081 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:28:50,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:28:50,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1866602273, now seen corresponding path program 36 times [2022-02-18 16:28:50,081 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:28:50,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770189512] [2022-02-18 16:28:50,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:28:50,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:28:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:28:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:50,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:28:50,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770189512] [2022-02-18 16:28:50,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770189512] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:28:50,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633321251] [2022-02-18 16:28:50,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:28:50,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:50,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:28:50,407 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) [2022-02-18 16:28:50,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-02-18 16:28:50,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-02-18 16:28:50,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:28:50,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:28:50,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:28:50,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 272 [2022-02-18 16:28:51,337 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 440 treesize of output 364 [2022-02-18 16:28:51,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 364 treesize of output 330 [2022-02-18 16:28:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:51,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:28:52,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:28:52,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 151 [2022-02-18 16:28:52,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 141 [2022-02-18 16:28:53,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:53,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 567 treesize of output 511 [2022-02-18 16:28:54,557 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:54,557 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 535 treesize of output 487 [2022-02-18 16:28:54,565 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:28:54,565 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 479 treesize of output 403 [2022-02-18 16:28:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:54,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633321251] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:28:54,984 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:28:54,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:28:54,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474611044] [2022-02-18 16:28:54,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:28:54,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:28:54,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:28:54,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:28:54,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:28:54,984 INFO L87 Difference]: Start difference. First operand 562 states and 1747 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:28:56,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:28:56,080 INFO L93 Difference]: Finished difference Result 724 states and 2199 transitions. [2022-02-18 16:28:56,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-18 16:28:56,080 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:28:56,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:28:56,081 INFO L225 Difference]: With dead ends: 724 [2022-02-18 16:28:56,081 INFO L226 Difference]: Without dead ends: 709 [2022-02-18 16:28:56,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=265, Invalid=995, Unknown=0, NotChecked=0, Total=1260 [2022-02-18 16:28:56,081 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 104 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:28:56,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 170 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:28:56,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2022-02-18 16:28:56,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 568. [2022-02-18 16:28:56,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 3.1181657848324513) internal successors, (1768), 567 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:28:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1768 transitions. [2022-02-18 16:28:56,089 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1768 transitions. Word has length 20 [2022-02-18 16:28:56,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:28:56,089 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 1768 transitions. [2022-02-18 16:28:56,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:28:56,089 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1768 transitions. [2022-02-18 16:28:56,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:28:56,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:28:56,090 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] [2022-02-18 16:28:56,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-02-18 16:28:56,290 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,SelfDestructingSolverStorable85 [2022-02-18 16:28:56,290 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:28:56,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:28:56,291 INFO L85 PathProgramCache]: Analyzing trace with hash -680185941, now seen corresponding path program 37 times [2022-02-18 16:28:56,291 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:28:56,291 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757649428] [2022-02-18 16:28:56,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:28:56,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:28:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:28:56,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:56,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:28:56,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757649428] [2022-02-18 16:28:56,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757649428] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:28:56,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312910097] [2022-02-18 16:28:56,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:28:56,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:28:56,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:28:56,540 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) [2022-02-18 16:28:56,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-02-18 16:28:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:28:56,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 31 conjunts are in the unsatisfiable core [2022-02-18 16:28:56,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:28:56,897 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 328 treesize of output 284 [2022-02-18 16:28:57,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 404 treesize of output 348 [2022-02-18 16:28:57,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 348 treesize of output 300 [2022-02-18 16:28:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:28:58,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:28:58,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 105 [2022-02-18 16:28:59,958 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 222 treesize of output 212 [2022-02-18 16:28:59,960 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 212 treesize of output 202 [2022-02-18 16:29:00,477 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:00,477 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 609 treesize of output 545 [2022-02-18 16:29:01,906 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:01,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 577 treesize of output 489 [2022-02-18 16:29:01,915 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:01,915 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 481 treesize of output 433 [2022-02-18 16:29:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:02,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312910097] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:29:02,909 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:29:02,909 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:29:02,909 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495297459] [2022-02-18 16:29:02,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:29:02,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:29:02,909 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:29:02,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:29:02,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:29:02,910 INFO L87 Difference]: Start difference. First operand 568 states and 1768 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:29:08,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:29:08,217 INFO L93 Difference]: Finished difference Result 1063 states and 3159 transitions. [2022-02-18 16:29:08,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-18 16:29:08,218 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 20 [2022-02-18 16:29:08,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:29:08,219 INFO L225 Difference]: With dead ends: 1063 [2022-02-18 16:29:08,219 INFO L226 Difference]: Without dead ends: 1003 [2022-02-18 16:29:08,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=497, Invalid=2925, Unknown=0, NotChecked=0, Total=3422 [2022-02-18 16:29:08,220 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 176 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 1581 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-18 16:29:08,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 505 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1581 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-18 16:29:08,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-02-18 16:29:08,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 583. [2022-02-18 16:29:08,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.1512027491408934) internal successors, (1834), 582 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:29:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1834 transitions. [2022-02-18 16:29:08,228 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1834 transitions. Word has length 20 [2022-02-18 16:29:08,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:29:08,228 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 1834 transitions. [2022-02-18 16:29:08,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:29:08,228 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1834 transitions. [2022-02-18 16:29:08,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:29:08,229 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:29:08,229 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] [2022-02-18 16:29:08,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-02-18 16:29:08,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:08,430 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:29:08,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:29:08,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1513283535, now seen corresponding path program 38 times [2022-02-18 16:29:08,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:29:08,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807569187] [2022-02-18 16:29:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:29:08,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:29:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:29:08,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:08,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:29:08,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807569187] [2022-02-18 16:29:08,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807569187] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:29:08,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015987546] [2022-02-18 16:29:08,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:29:08,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:08,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:29:08,703 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) [2022-02-18 16:29:08,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-02-18 16:29:08,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:29:08,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:29:08,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:29:08,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:29:08,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 234 [2022-02-18 16:29:09,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 329 treesize of output 289 [2022-02-18 16:29:09,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 241 [2022-02-18 16:29:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:09,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:29:10,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:29:10,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 151 [2022-02-18 16:29:10,294 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 151 treesize of output 141 [2022-02-18 16:29:10,883 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:10,884 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 273 treesize of output 245 [2022-02-18 16:29:11,766 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:11,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 561 treesize of output 485 [2022-02-18 16:29:11,773 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:11,774 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 477 treesize of output 425 [2022-02-18 16:29:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:12,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015987546] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:29:12,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:29:12,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-18 16:29:12,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608276436] [2022-02-18 16:29:12,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:29:12,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-18 16:29:12,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:29:12,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-18 16:29:12,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2022-02-18 16:29:12,178 INFO L87 Difference]: Start difference. First operand 583 states and 1834 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) [2022-02-18 16:29:12,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:29:12,743 INFO L93 Difference]: Finished difference Result 682 states and 2118 transitions. [2022-02-18 16:29:12,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-18 16:29:12,744 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 20 [2022-02-18 16:29:12,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:29:12,745 INFO L225 Difference]: With dead ends: 682 [2022-02-18 16:29:12,745 INFO L226 Difference]: Without dead ends: 667 [2022-02-18 16:29:12,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:29:12,745 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:29:12,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 180 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:29:12,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-02-18 16:29:12,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 583. [2022-02-18 16:29:12,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.1512027491408934) internal successors, (1834), 582 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:29:12,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1834 transitions. [2022-02-18 16:29:12,752 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1834 transitions. Word has length 20 [2022-02-18 16:29:12,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:29:12,758 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 1834 transitions. [2022-02-18 16:29:12,758 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) [2022-02-18 16:29:12,758 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1834 transitions. [2022-02-18 16:29:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:29:12,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:29:12,759 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] [2022-02-18 16:29:12,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-02-18 16:29:12,959 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,SelfDestructingSolverStorable87 [2022-02-18 16:29:12,960 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:29:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:29:12,961 INFO L85 PathProgramCache]: Analyzing trace with hash 183961409, now seen corresponding path program 39 times [2022-02-18 16:29:12,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:29:12,961 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633113018] [2022-02-18 16:29:12,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:29:12,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:29:12,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:29:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:13,186 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:29:13,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633113018] [2022-02-18 16:29:13,186 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633113018] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:29:13,186 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293531884] [2022-02-18 16:29:13,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:29:13,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:13,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:29:13,187 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) [2022-02-18 16:29:13,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-02-18 16:29:13,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-18 16:29:13,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:29:13,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:29:13,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:29:13,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 262 treesize of output 230 [2022-02-18 16:29:13,636 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 311 treesize of output 267 [2022-02-18 16:29:13,639 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 267 treesize of output 227 [2022-02-18 16:29:14,347 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:14,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:29:14,642 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 113 treesize of output 103 [2022-02-18 16:29:14,888 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 135 treesize of output 125 [2022-02-18 16:29:14,891 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 125 treesize of output 115 [2022-02-18 16:29:15,526 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:15,527 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 456 treesize of output 416 [2022-02-18 16:29:16,141 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:16,142 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 301 treesize of output 273 [2022-02-18 16:29:16,149 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:16,149 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 252 treesize of output 220 [2022-02-18 16:29:16,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:16,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293531884] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:29:16,421 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:29:16,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-02-18 16:29:16,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809959349] [2022-02-18 16:29:16,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:29:16,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-18 16:29:16,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:29:16,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-18 16:29:16,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=441, Unknown=0, NotChecked=0, Total=552 [2022-02-18 16:29:16,422 INFO L87 Difference]: Start difference. First operand 583 states and 1834 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) [2022-02-18 16:29:16,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:29:16,988 INFO L93 Difference]: Finished difference Result 700 states and 2169 transitions. [2022-02-18 16:29:16,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-18 16:29:16,989 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 20 [2022-02-18 16:29:16,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:29:16,990 INFO L225 Difference]: With dead ends: 700 [2022-02-18 16:29:16,990 INFO L226 Difference]: Without dead ends: 685 [2022-02-18 16:29:16,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=159, Invalid=597, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:29:16,990 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 60 mSDsluCounter, 368 mSDsCounter, 0 mSdLazyCounter, 757 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:29:16,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 177 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 757 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:29:16,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2022-02-18 16:29:16,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 580. [2022-02-18 16:29:16,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 579 states have (on average 3.151986183074266) internal successors, (1825), 579 states have internal predecessors, (1825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:29:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 1825 transitions. [2022-02-18 16:29:16,997 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 1825 transitions. Word has length 20 [2022-02-18 16:29:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:29:16,997 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 1825 transitions. [2022-02-18 16:29:16,997 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) [2022-02-18 16:29:16,997 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 1825 transitions. [2022-02-18 16:29:16,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:29:16,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:29:16,998 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] [2022-02-18 16:29:17,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-02-18 16:29:17,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:17,198 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:29:17,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:29:17,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1735531487, now seen corresponding path program 40 times [2022-02-18 16:29:17,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:29:17,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712121665] [2022-02-18 16:29:17,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:29:17,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:29:17,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:29:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:17,517 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:29:17,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712121665] [2022-02-18 16:29:17,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712121665] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:29:17,517 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671672659] [2022-02-18 16:29:17,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:29:17,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:17,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:29:17,518 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) [2022-02-18 16:29:17,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-02-18 16:29:17,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:29:17,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:29:17,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:29:17,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:29:17,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 222 treesize of output 198 [2022-02-18 16:29:18,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 302 treesize of output 258 [2022-02-18 16:29:18,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 222 [2022-02-18 16:29:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:18,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:29:18,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:29:19,674 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:29:19,676 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-02-18 16:29:19,910 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:19,910 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 217 treesize of output 197 [2022-02-18 16:29:20,369 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:20,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 460 treesize of output 388 [2022-02-18 16:29:20,377 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:20,378 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 345 treesize of output 309 [2022-02-18 16:29:20,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:20,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671672659] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:29:20,515 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:29:20,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:29:20,515 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558563920] [2022-02-18 16:29:20,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:29:20,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:29:20,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:29:20,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:29:20,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:29:20,516 INFO L87 Difference]: Start difference. First operand 580 states and 1825 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:29:24,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:29:24,878 INFO L93 Difference]: Finished difference Result 994 states and 3038 transitions. [2022-02-18 16:29:24,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-18 16:29:24,878 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:29:24,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:29:24,880 INFO L225 Difference]: With dead ends: 994 [2022-02-18 16:29:24,880 INFO L226 Difference]: Without dead ends: 979 [2022-02-18 16:29:24,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1038 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=577, Invalid=3083, Unknown=0, NotChecked=0, Total=3660 [2022-02-18 16:29:24,880 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 197 mSDsluCounter, 954 mSDsCounter, 0 mSdLazyCounter, 1756 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 1756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-18 16:29:24,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 431 Invalid, 1877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 1756 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-18 16:29:24,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-02-18 16:29:24,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 583. [2022-02-18 16:29:24,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.1512027491408934) internal successors, (1834), 582 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:29:24,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1834 transitions. [2022-02-18 16:29:24,888 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1834 transitions. Word has length 20 [2022-02-18 16:29:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:29:24,888 INFO L470 AbstractCegarLoop]: Abstraction has 583 states and 1834 transitions. [2022-02-18 16:29:24,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:29:24,888 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1834 transitions. [2022-02-18 16:29:24,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:29:24,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:29:24,889 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] [2022-02-18 16:29:24,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-02-18 16:29:25,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:25,090 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:29:25,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:29:25,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1249500585, now seen corresponding path program 41 times [2022-02-18 16:29:25,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:29:25,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703907263] [2022-02-18 16:29:25,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:29:25,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:29:25,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:29:25,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:25,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:29:25,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703907263] [2022-02-18 16:29:25,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703907263] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:29:25,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667488634] [2022-02-18 16:29:25,442 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:29:25,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:25,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:29:25,444 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) [2022-02-18 16:29:25,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-02-18 16:29:25,471 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-02-18 16:29:25,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:29:25,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:29:25,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:29:25,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 271 treesize of output 235 [2022-02-18 16:29:26,248 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 385 treesize of output 353 [2022-02-18 16:29:26,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 353 treesize of output 289 [2022-02-18 16:29:26,938 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:26,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:29:27,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:29:27,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 151 [2022-02-18 16:29:27,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 141 [2022-02-18 16:29:28,450 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:28,450 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 472 treesize of output 432 [2022-02-18 16:29:29,315 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:29,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 491 treesize of output 419 [2022-02-18 16:29:29,323 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:29,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 411 treesize of output 363 [2022-02-18 16:29:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:29,602 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667488634] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:29:29,602 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:29:29,602 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:29:29,602 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747665408] [2022-02-18 16:29:29,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:29:29,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:29:29,603 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:29:29,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:29:29,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:29:29,603 INFO L87 Difference]: Start difference. First operand 583 states and 1834 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:29:33,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:29:33,102 INFO L93 Difference]: Finished difference Result 916 states and 2779 transitions. [2022-02-18 16:29:33,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-18 16:29:33,102 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:29:33,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:29:33,103 INFO L225 Difference]: With dead ends: 916 [2022-02-18 16:29:33,104 INFO L226 Difference]: Without dead ends: 901 [2022-02-18 16:29:33,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=428, Invalid=2022, Unknown=0, NotChecked=0, Total=2450 [2022-02-18 16:29:33,104 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 146 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:29:33,104 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 352 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1436 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 16:29:33,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 901 states. [2022-02-18 16:29:33,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 901 to 589. [2022-02-18 16:29:33,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 3.1547619047619047) internal successors, (1855), 588 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:29:33,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1855 transitions. [2022-02-18 16:29:33,112 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1855 transitions. Word has length 20 [2022-02-18 16:29:33,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:29:33,112 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 1855 transitions. [2022-02-18 16:29:33,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:29:33,112 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1855 transitions. [2022-02-18 16:29:33,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:29:33,113 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:29:33,113 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] [2022-02-18 16:29:33,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-02-18 16:29:33,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:33,313 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:29:33,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:29:33,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1297287629, now seen corresponding path program 42 times [2022-02-18 16:29:33,314 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:29:33,314 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976812999] [2022-02-18 16:29:33,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:29:33,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:29:33,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:29:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:33,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:29:33,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976812999] [2022-02-18 16:29:33,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976812999] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:29:33,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869238870] [2022-02-18 16:29:33,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:29:33,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:33,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:29:33,668 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) [2022-02-18 16:29:33,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-02-18 16:29:33,695 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 16:29:33,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:29:33,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:29:33,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:29:33,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 299 treesize of output 251 [2022-02-18 16:29:34,583 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 293 treesize of output 245 [2022-02-18 16:29:34,585 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 245 treesize of output 221 [2022-02-18 16:29:35,030 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:35,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:29:35,332 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 113 treesize of output 103 [2022-02-18 16:29:36,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:36,046 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 392 treesize of output 360 [2022-02-18 16:29:36,514 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:36,514 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 448 treesize of output 376 [2022-02-18 16:29:36,522 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:36,522 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 345 treesize of output 309 [2022-02-18 16:29:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:36,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869238870] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:29:36,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:29:36,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:29:36,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181326452] [2022-02-18 16:29:36,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:29:36,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:29:36,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:29:36,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:29:36,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=602, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:29:36,651 INFO L87 Difference]: Start difference. First operand 589 states and 1855 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:29:37,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:29:37,638 INFO L93 Difference]: Finished difference Result 713 states and 2202 transitions. [2022-02-18 16:29:37,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-18 16:29:37,638 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:29:37,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:29:37,640 INFO L225 Difference]: With dead ends: 713 [2022-02-18 16:29:37,640 INFO L226 Difference]: Without dead ends: 698 [2022-02-18 16:29:37,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=170, Invalid=886, Unknown=0, NotChecked=0, Total=1056 [2022-02-18 16:29:37,640 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 74 mSDsluCounter, 489 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:29:37,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 198 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:29:37,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-18 16:29:37,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 592. [2022-02-18 16:29:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 3.1539763113367174) internal successors, (1864), 591 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:29:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1864 transitions. [2022-02-18 16:29:37,647 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1864 transitions. Word has length 20 [2022-02-18 16:29:37,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:29:37,647 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 1864 transitions. [2022-02-18 16:29:37,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:29:37,647 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1864 transitions. [2022-02-18 16:29:37,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:29:37,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:29:37,648 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] [2022-02-18 16:29:37,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-02-18 16:29:37,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:37,849 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:29:37,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:29:37,849 INFO L85 PathProgramCache]: Analyzing trace with hash -2130385223, now seen corresponding path program 43 times [2022-02-18 16:29:37,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:29:37,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209098623] [2022-02-18 16:29:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:29:37,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:29:37,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:29:38,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:38,158 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:29:38,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209098623] [2022-02-18 16:29:38,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209098623] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:29:38,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584076085] [2022-02-18 16:29:38,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:29:38,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:38,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:29:38,159 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) [2022-02-18 16:29:38,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-02-18 16:29:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:29:38,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:29:38,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:29:38,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 264 treesize of output 232 [2022-02-18 16:29:38,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 345 treesize of output 301 [2022-02-18 16:29:38,754 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 301 treesize of output 253 [2022-02-18 16:29:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:39,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:29:39,644 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:29:40,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 135 [2022-02-18 16:29:40,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 125 [2022-02-18 16:29:40,607 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:40,607 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 273 treesize of output 245 [2022-02-18 16:29:41,670 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:41,670 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 502 treesize of output 430 [2022-02-18 16:29:41,677 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:41,677 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 422 treesize of output 370 [2022-02-18 16:29:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:42,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584076085] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:29:42,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:29:42,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:29:42,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792763913] [2022-02-18 16:29:42,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:29:42,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:29:42,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:29:42,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:29:42,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:29:42,012 INFO L87 Difference]: Start difference. First operand 592 states and 1864 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:29:43,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:29:43,673 INFO L93 Difference]: Finished difference Result 767 states and 2362 transitions. [2022-02-18 16:29:43,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-18 16:29:43,673 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:29:43,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:29:43,674 INFO L225 Difference]: With dead ends: 767 [2022-02-18 16:29:43,674 INFO L226 Difference]: Without dead ends: 752 [2022-02-18 16:29:43,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2022-02-18 16:29:43,675 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 100 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 1272 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 16:29:43,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 268 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1272 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-18 16:29:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-02-18 16:29:43,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 590. [2022-02-18 16:29:43,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 3.1561969439728355) internal successors, (1859), 589 states have internal predecessors, (1859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:29:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1859 transitions. [2022-02-18 16:29:43,682 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1859 transitions. Word has length 20 [2022-02-18 16:29:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:29:43,682 INFO L470 AbstractCegarLoop]: Abstraction has 590 states and 1859 transitions. [2022-02-18 16:29:43,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:29:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1859 transitions. [2022-02-18 16:29:43,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:29:43,683 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:29:43,683 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] [2022-02-18 16:29:43,701 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-02-18 16:29:43,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:43,884 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:29:43,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:29:43,884 INFO L85 PathProgramCache]: Analyzing trace with hash -660545775, now seen corresponding path program 44 times [2022-02-18 16:29:43,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:29:43,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438957242] [2022-02-18 16:29:43,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:29:43,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:29:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:29:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:44,216 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:29:44,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438957242] [2022-02-18 16:29:44,216 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438957242] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:29:44,216 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610014794] [2022-02-18 16:29:44,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:29:44,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:44,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:29:44,217 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) [2022-02-18 16:29:44,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-02-18 16:29:44,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:29:44,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:29:44,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:29:44,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:29:44,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 201 [2022-02-18 16:29:44,856 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 302 treesize of output 258 [2022-02-18 16:29:44,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 222 [2022-02-18 16:29:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:45,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:29:45,628 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 113 treesize of output 103 [2022-02-18 16:29:46,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:29:46,704 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 20 treesize of output 18 [2022-02-18 16:29:47,051 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:47,051 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 417 treesize of output 381 [2022-02-18 16:29:47,485 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:47,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 303 treesize of output 263 [2022-02-18 16:29:47,494 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:47,494 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 231 treesize of output 203 [2022-02-18 16:29:47,621 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:47,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610014794] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:29:47,621 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:29:47,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:29:47,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402245807] [2022-02-18 16:29:47,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:29:47,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:29:47,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:29:47,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:29:47,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:29:47,622 INFO L87 Difference]: Start difference. First operand 590 states and 1859 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:29:49,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:29:49,288 INFO L93 Difference]: Finished difference Result 832 states and 2570 transitions. [2022-02-18 16:29:49,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-18 16:29:49,288 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:29:49,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:29:49,289 INFO L225 Difference]: With dead ends: 832 [2022-02-18 16:29:49,289 INFO L226 Difference]: Without dead ends: 817 [2022-02-18 16:29:49,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=197, Invalid=1135, Unknown=0, NotChecked=0, Total=1332 [2022-02-18 16:29:49,290 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 121 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 1289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 16:29:49,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 268 Invalid, 1289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-18 16:29:49,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2022-02-18 16:29:49,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 593. [2022-02-18 16:29:49,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1554054054054053) internal successors, (1868), 592 states have internal predecessors, (1868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:29:49,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1868 transitions. [2022-02-18 16:29:49,297 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1868 transitions. Word has length 20 [2022-02-18 16:29:49,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:29:49,297 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1868 transitions. [2022-02-18 16:29:49,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:29:49,297 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1868 transitions. [2022-02-18 16:29:49,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:29:49,298 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:29:49,298 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] [2022-02-18 16:29:49,314 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-02-18 16:29:49,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:49,499 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:29:49,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:29:49,499 INFO L85 PathProgramCache]: Analyzing trace with hash -962457887, now seen corresponding path program 45 times [2022-02-18 16:29:49,499 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:29:49,499 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231088031] [2022-02-18 16:29:49,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:29:49,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:29:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:29:49,828 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:49,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:29:49,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231088031] [2022-02-18 16:29:49,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231088031] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:29:49,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116100686] [2022-02-18 16:29:49,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:29:49,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:49,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:29:49,829 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) [2022-02-18 16:29:49,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-02-18 16:29:49,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-18 16:29:49,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:29:49,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:29:49,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:29:50,340 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 237 [2022-02-18 16:29:50,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 277 treesize of output 233 [2022-02-18 16:29:50,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 233 treesize of output 205 [2022-02-18 16:29:51,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:51,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:29:51,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:29:52,537 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:52,538 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 547 treesize of output 483 [2022-02-18 16:29:53,403 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 22 treesize of output 20 [2022-02-18 16:29:53,421 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-02-18 16:29:53,698 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:53,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 278 treesize of output 246 [2022-02-18 16:29:53,705 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:53,705 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 238 treesize of output 214 [2022-02-18 16:29:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:53,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116100686] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:29:53,954 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:29:53,954 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-18 16:29:53,954 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184337490] [2022-02-18 16:29:53,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:29:53,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-18 16:29:53,954 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:29:53,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-18 16:29:53,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-02-18 16:29:53,954 INFO L87 Difference]: Start difference. First operand 593 states and 1868 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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) [2022-02-18 16:29:56,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:29:56,890 INFO L93 Difference]: Finished difference Result 896 states and 2735 transitions. [2022-02-18 16:29:56,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-18 16:29:56,890 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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 20 [2022-02-18 16:29:56,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:29:56,892 INFO L225 Difference]: With dead ends: 896 [2022-02-18 16:29:56,892 INFO L226 Difference]: Without dead ends: 881 [2022-02-18 16:29:56,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=295, Invalid=1597, Unknown=0, NotChecked=0, Total=1892 [2022-02-18 16:29:56,892 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 144 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 1503 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 1574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-18 16:29:56,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 358 Invalid, 1574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1503 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-18 16:29:56,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-02-18 16:29:56,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 599. [2022-02-18 16:29:56,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 3.1588628762541804) internal successors, (1889), 598 states have internal predecessors, (1889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:29:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1889 transitions. [2022-02-18 16:29:56,900 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1889 transitions. Word has length 20 [2022-02-18 16:29:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:29:56,900 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 1889 transitions. [2022-02-18 16:29:56,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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) [2022-02-18 16:29:56,900 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1889 transitions. [2022-02-18 16:29:56,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:29:56,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:29:56,901 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] [2022-02-18 16:29:56,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-02-18 16:29:57,107 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,SelfDestructingSolverStorable94 [2022-02-18 16:29:57,108 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:29:57,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:29:57,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1716316899, now seen corresponding path program 46 times [2022-02-18 16:29:57,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:29:57,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171612914] [2022-02-18 16:29:57,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:29:57,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:29:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:29:57,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:57,513 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:29:57,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171612914] [2022-02-18 16:29:57,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171612914] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:29:57,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495602598] [2022-02-18 16:29:57,513 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:29:57,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:29:57,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:29:57,514 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) [2022-02-18 16:29:57,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-02-18 16:29:57,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:29:57,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:29:57,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:29:57,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:29:57,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 304 treesize of output 264 [2022-02-18 16:29:58,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 244 treesize of output 208 [2022-02-18 16:29:58,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 208 treesize of output 180 [2022-02-18 16:29:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:29:58,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:29:59,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 135 [2022-02-18 16:29:59,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:29:59,833 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 547 treesize of output 483 [2022-02-18 16:30:00,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:30:00,688 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 20 treesize of output 18 [2022-02-18 16:30:00,942 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:00,942 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 328 treesize of output 288 [2022-02-18 16:30:00,949 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:00,949 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 280 treesize of output 248 [2022-02-18 16:30:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:01,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495602598] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:30:01,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:30:01,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:30:01,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138479391] [2022-02-18 16:30:01,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:30:01,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:30:01,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:30:01,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:30:01,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:30:01,279 INFO L87 Difference]: Start difference. First operand 599 states and 1889 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:30:04,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:30:04,045 INFO L93 Difference]: Finished difference Result 823 states and 2519 transitions. [2022-02-18 16:30:04,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-18 16:30:04,046 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:30:04,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:30:04,047 INFO L225 Difference]: With dead ends: 823 [2022-02-18 16:30:04,047 INFO L226 Difference]: Without dead ends: 808 [2022-02-18 16:30:04,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=298, Invalid=1594, Unknown=0, NotChecked=0, Total=1892 [2022-02-18 16:30:04,048 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 113 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 1308 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 1352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:30:04,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 304 Invalid, 1352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1308 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 16:30:04,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-02-18 16:30:04,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 600. [2022-02-18 16:30:04,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 3.1602671118530883) internal successors, (1893), 599 states have internal predecessors, (1893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:30:04,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1893 transitions. [2022-02-18 16:30:04,056 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1893 transitions. Word has length 20 [2022-02-18 16:30:04,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:30:04,057 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 1893 transitions. [2022-02-18 16:30:04,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:30:04,057 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1893 transitions. [2022-02-18 16:30:04,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:30:04,058 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:30:04,058 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] [2022-02-18 16:30:04,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-02-18 16:30:04,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:04,259 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:30:04,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:30:04,259 INFO L85 PathProgramCache]: Analyzing trace with hash -799659775, now seen corresponding path program 47 times [2022-02-18 16:30:04,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:30:04,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726511632] [2022-02-18 16:30:04,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:30:04,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:30:04,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:30:04,476 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:04,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:30:04,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726511632] [2022-02-18 16:30:04,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726511632] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:30:04,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039460560] [2022-02-18 16:30:04,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:30:04,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:04,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:30:04,478 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) [2022-02-18 16:30:04,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-02-18 16:30:04,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 16:30:04,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:30:04,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:30:04,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:30:04,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:30:04,911 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 308 treesize of output 260 [2022-02-18 16:30:05,271 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:30:05,271 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 353 treesize of output 309 [2022-02-18 16:30:05,275 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 261 [2022-02-18 16:30:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:05,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:30:06,181 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 113 treesize of output 103 [2022-02-18 16:30:07,108 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:07,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 456 treesize of output 416 [2022-02-18 16:30:07,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:30:07,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-02-18 16:30:08,127 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:08,128 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 293 treesize of output 261 [2022-02-18 16:30:08,134 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:08,135 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 253 treesize of output 221 [2022-02-18 16:30:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:08,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039460560] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:30:08,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:30:08,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:30:08,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859323153] [2022-02-18 16:30:08,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:30:08,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:30:08,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:30:08,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:30:08,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:30:08,269 INFO L87 Difference]: Start difference. First operand 600 states and 1893 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) [2022-02-18 16:30:08,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:30:08,872 INFO L93 Difference]: Finished difference Result 736 states and 2287 transitions. [2022-02-18 16:30:08,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-18 16:30:08,873 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 20 [2022-02-18 16:30:08,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:30:08,874 INFO L225 Difference]: With dead ends: 736 [2022-02-18 16:30:08,874 INFO L226 Difference]: Without dead ends: 721 [2022-02-18 16:30:08,874 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=144, Invalid=786, Unknown=0, NotChecked=0, Total=930 [2022-02-18 16:30:08,874 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 65 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-18 16:30:08,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 158 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 660 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2022-02-18 16:30:08,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-02-18 16:30:08,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 602. [2022-02-18 16:30:08,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 3.1613976705490847) internal successors, (1900), 601 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:30:08,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1900 transitions. [2022-02-18 16:30:08,881 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1900 transitions. Word has length 20 [2022-02-18 16:30:08,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:30:08,881 INFO L470 AbstractCegarLoop]: Abstraction has 602 states and 1900 transitions. [2022-02-18 16:30:08,881 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) [2022-02-18 16:30:08,881 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1900 transitions. [2022-02-18 16:30:08,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:30:08,882 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:30:08,882 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] [2022-02-18 16:30:08,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-02-18 16:30:09,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:09,083 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:30:09,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:30:09,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1985813891, now seen corresponding path program 48 times [2022-02-18 16:30:09,083 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:30:09,083 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041664692] [2022-02-18 16:30:09,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:30:09,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:30:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:30:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:09,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:30:09,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041664692] [2022-02-18 16:30:09,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041664692] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:30:09,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013768613] [2022-02-18 16:30:09,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:30:09,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:09,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:30:09,372 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) [2022-02-18 16:30:09,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-02-18 16:30:09,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-18 16:30:09,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:30:09,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:30:09,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:30:09,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 260 [2022-02-18 16:30:10,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 309 treesize of output 265 [2022-02-18 16:30:10,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 229 [2022-02-18 16:30:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:10,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:30:11,192 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 49 treesize of output 45 [2022-02-18 16:30:11,726 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:11,727 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 456 treesize of output 416 [2022-02-18 16:30:12,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:30:12,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2022-02-18 16:30:12,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:12,662 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 309 treesize of output 269 [2022-02-18 16:30:12,669 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:12,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 231 treesize of output 203 [2022-02-18 16:30:12,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:12,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013768613] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:30:12,809 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:30:12,809 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:30:12,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140590233] [2022-02-18 16:30:12,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:30:12,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:30:12,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:30:12,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:30:12,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:30:12,810 INFO L87 Difference]: Start difference. First operand 602 states and 1900 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:30:13,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:30:13,676 INFO L93 Difference]: Finished difference Result 756 states and 2342 transitions. [2022-02-18 16:30:13,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-18 16:30:13,676 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:30:13,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:30:13,678 INFO L225 Difference]: With dead ends: 756 [2022-02-18 16:30:13,678 INFO L226 Difference]: Without dead ends: 741 [2022-02-18 16:30:13,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=190, Invalid=1000, Unknown=0, NotChecked=0, Total=1190 [2022-02-18 16:30:13,678 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 71 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:30:13,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 193 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:30:13,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 741 states. [2022-02-18 16:30:13,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 741 to 601. [2022-02-18 16:30:13,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 600 states have (on average 3.165) internal successors, (1899), 600 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:30:13,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 1899 transitions. [2022-02-18 16:30:13,685 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 1899 transitions. Word has length 20 [2022-02-18 16:30:13,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:30:13,685 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 1899 transitions. [2022-02-18 16:30:13,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:30:13,685 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 1899 transitions. [2022-02-18 16:30:13,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:30:13,686 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:30:13,686 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] [2022-02-18 16:30:13,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-02-18 16:30:13,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:13,887 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:30:13,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:30:13,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1188317543, now seen corresponding path program 49 times [2022-02-18 16:30:13,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:30:13,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28654177] [2022-02-18 16:30:13,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:30:13,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:30:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:30:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:14,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:30:14,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28654177] [2022-02-18 16:30:14,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28654177] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:30:14,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296769528] [2022-02-18 16:30:14,338 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:30:14,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:14,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:30:14,339 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) [2022-02-18 16:30:14,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-02-18 16:30:14,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:30:14,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:30:14,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:30:14,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 319 treesize of output 283 [2022-02-18 16:30:14,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 318 treesize of output 278 [2022-02-18 16:30:14,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 278 treesize of output 238 [2022-02-18 16:30:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:15,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:30:15,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:30:16,192 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 161 treesize of output 151 [2022-02-18 16:30:16,194 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 141 [2022-02-18 16:30:17,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:17,158 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 509 treesize of output 453 [2022-02-18 16:30:17,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:17,955 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 332 treesize of output 292 [2022-02-18 16:30:17,962 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:17,962 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 284 treesize of output 252 [2022-02-18 16:30:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:18,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296769528] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:30:18,095 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:30:18,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:30:18,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164328009] [2022-02-18 16:30:18,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:30:18,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:30:18,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:30:18,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:30:18,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:30:18,096 INFO L87 Difference]: Start difference. First operand 601 states and 1899 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:30:23,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:30:23,227 INFO L93 Difference]: Finished difference Result 968 states and 2930 transitions. [2022-02-18 16:30:23,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-18 16:30:23,227 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:30:23,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:30:23,229 INFO L225 Difference]: With dead ends: 968 [2022-02-18 16:30:23,229 INFO L226 Difference]: Without dead ends: 938 [2022-02-18 16:30:23,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=543, Invalid=2649, Unknown=0, NotChecked=0, Total=3192 [2022-02-18 16:30:23,229 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 239 mSDsluCounter, 593 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:30:23,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 298 Invalid, 1350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1191 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 16:30:23,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-02-18 16:30:23,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 597. [2022-02-18 16:30:23,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 596 states have (on average 3.1593959731543624) internal successors, (1883), 596 states have internal predecessors, (1883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:30:23,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 1883 transitions. [2022-02-18 16:30:23,237 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 1883 transitions. Word has length 20 [2022-02-18 16:30:23,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:30:23,237 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 1883 transitions. [2022-02-18 16:30:23,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:30:23,237 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 1883 transitions. [2022-02-18 16:30:23,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:30:23,238 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:30:23,238 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] [2022-02-18 16:30:23,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-02-18 16:30:23,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:23,439 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:30:23,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:30:23,440 INFO L85 PathProgramCache]: Analyzing trace with hash 641845433, now seen corresponding path program 50 times [2022-02-18 16:30:23,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:30:23,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537270418] [2022-02-18 16:30:23,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:30:23,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:30:23,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:30:23,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:23,786 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:30:23,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537270418] [2022-02-18 16:30:23,786 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537270418] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:30:23,786 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300301286] [2022-02-18 16:30:23,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:30:23,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:23,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:30:23,787 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) [2022-02-18 16:30:23,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-02-18 16:30:23,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:30:23,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:30:23,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:30:23,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:30:24,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 273 treesize of output 229 [2022-02-18 16:30:24,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 299 treesize of output 255 [2022-02-18 16:30:24,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 219 [2022-02-18 16:30:24,989 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:24,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:30:25,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:30:25,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 125 [2022-02-18 16:30:25,532 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 125 treesize of output 115 [2022-02-18 16:30:26,151 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:26,152 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 456 treesize of output 416 [2022-02-18 16:30:26,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:26,788 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 302 treesize of output 262 [2022-02-18 16:30:26,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:26,797 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 231 treesize of output 203 [2022-02-18 16:30:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:26,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300301286] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:30:26,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:30:26,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-02-18 16:30:26,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724372906] [2022-02-18 16:30:26,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:30:26,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-18 16:30:26,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:30:26,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-18 16:30:26,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2022-02-18 16:30:26,993 INFO L87 Difference]: Start difference. First operand 597 states and 1883 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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) [2022-02-18 16:30:28,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:30:28,928 INFO L93 Difference]: Finished difference Result 913 states and 2792 transitions. [2022-02-18 16:30:28,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-18 16:30:28,928 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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 20 [2022-02-18 16:30:28,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:30:28,929 INFO L225 Difference]: With dead ends: 913 [2022-02-18 16:30:28,930 INFO L226 Difference]: Without dead ends: 898 [2022-02-18 16:30:28,930 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=303, Invalid=1419, Unknown=0, NotChecked=0, Total=1722 [2022-02-18 16:30:28,930 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 107 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 1299 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:30:28,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 299 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1299 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 16:30:28,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 898 states. [2022-02-18 16:30:28,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 898 to 595. [2022-02-18 16:30:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 3.1565656565656566) internal successors, (1875), 594 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:30:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1875 transitions. [2022-02-18 16:30:28,938 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1875 transitions. Word has length 20 [2022-02-18 16:30:28,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:30:28,938 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1875 transitions. [2022-02-18 16:30:28,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 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) [2022-02-18 16:30:28,938 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1875 transitions. [2022-02-18 16:30:28,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:30:28,939 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:30:28,939 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] [2022-02-18 16:30:28,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-02-18 16:30:29,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-02-18 16:30:29,143 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:30:29,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:30:29,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1258479839, now seen corresponding path program 51 times [2022-02-18 16:30:29,144 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:30:29,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140703887] [2022-02-18 16:30:29,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:30:29,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:30:29,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:30:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:29,513 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:30:29,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140703887] [2022-02-18 16:30:29,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140703887] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:30:29,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087357370] [2022-02-18 16:30:29,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:30:29,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:29,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:30:29,514 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) [2022-02-18 16:30:29,515 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-02-18 16:30:29,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 16:30:29,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:30:29,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:30:29,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:30:29,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 304 treesize of output 264 [2022-02-18 16:30:30,219 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 336 treesize of output 288 [2022-02-18 16:30:30,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 252 [2022-02-18 16:30:30,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:30,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:30:31,090 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 113 treesize of output 103 [2022-02-18 16:30:31,359 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 161 treesize of output 151 [2022-02-18 16:30:31,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 141 [2022-02-18 16:30:32,355 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:32,355 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 613 treesize of output 537 [2022-02-18 16:30:32,981 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:32,981 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 386 treesize of output 358 [2022-02-18 16:30:32,988 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:32,988 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 350 treesize of output 298 [2022-02-18 16:30:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:33,208 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087357370] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:30:33,208 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:30:33,208 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:30:33,208 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359844069] [2022-02-18 16:30:33,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:30:33,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:30:33,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:30:33,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:30:33,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:30:33,208 INFO L87 Difference]: Start difference. First operand 595 states and 1875 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:30:37,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:30:37,983 INFO L93 Difference]: Finished difference Result 899 states and 2694 transitions. [2022-02-18 16:30:37,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-18 16:30:37,983 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:30:37,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:30:37,985 INFO L225 Difference]: With dead ends: 899 [2022-02-18 16:30:37,985 INFO L226 Difference]: Without dead ends: 854 [2022-02-18 16:30:37,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=446, Invalid=2104, Unknown=0, NotChecked=0, Total=2550 [2022-02-18 16:30:37,985 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 191 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 16:30:37,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 300 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1046 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-18 16:30:37,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2022-02-18 16:30:37,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 595. [2022-02-18 16:30:37,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 3.1565656565656566) internal successors, (1875), 594 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:30:37,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1875 transitions. [2022-02-18 16:30:37,993 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1875 transitions. Word has length 20 [2022-02-18 16:30:37,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:30:37,993 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1875 transitions. [2022-02-18 16:30:37,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:30:37,993 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1875 transitions. [2022-02-18 16:30:37,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:30:37,994 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:30:37,994 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] [2022-02-18 16:30:38,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-02-18 16:30:38,194 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,SelfDestructingSolverStorable100 [2022-02-18 16:30:38,194 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:30:38,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:30:38,195 INFO L85 PathProgramCache]: Analyzing trace with hash 489699243, now seen corresponding path program 52 times [2022-02-18 16:30:38,195 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:30:38,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147616197] [2022-02-18 16:30:38,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:30:38,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:30:38,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:30:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:38,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:30:38,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147616197] [2022-02-18 16:30:38,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147616197] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:30:38,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11437708] [2022-02-18 16:30:38,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:30:38,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:38,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:30:38,576 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) [2022-02-18 16:30:38,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-02-18 16:30:38,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:30:38,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:30:38,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:30:38,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:30:38,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 333 treesize of output 289 [2022-02-18 16:30:39,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 308 treesize of output 260 [2022-02-18 16:30:39,563 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 260 treesize of output 232 [2022-02-18 16:30:40,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:40,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:30:40,337 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 113 treesize of output 103 [2022-02-18 16:30:41,168 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:41,169 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 528 treesize of output 452 [2022-02-18 16:30:41,599 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:41,600 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 356 treesize of output 304 [2022-02-18 16:30:41,606 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:41,606 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 296 treesize of output 268 [2022-02-18 16:30:41,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:41,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11437708] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:30:41,807 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:30:41,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:30:41,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28641281] [2022-02-18 16:30:41,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:30:41,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:30:41,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:30:41,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:30:41,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:30:41,808 INFO L87 Difference]: Start difference. First operand 595 states and 1875 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:30:44,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:30:44,299 INFO L93 Difference]: Finished difference Result 804 states and 2414 transitions. [2022-02-18 16:30:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-18 16:30:44,300 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:30:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:30:44,301 INFO L225 Difference]: With dead ends: 804 [2022-02-18 16:30:44,301 INFO L226 Difference]: Without dead ends: 744 [2022-02-18 16:30:44,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=273, Invalid=1533, Unknown=0, NotChecked=0, Total=1806 [2022-02-18 16:30:44,301 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 120 mSDsluCounter, 836 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 1513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:30:44,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 395 Invalid, 1513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 16:30:44,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-02-18 16:30:44,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 592. [2022-02-18 16:30:44,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 3.1590524534686972) internal successors, (1867), 591 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) [2022-02-18 16:30:44,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1867 transitions. [2022-02-18 16:30:44,308 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1867 transitions. Word has length 20 [2022-02-18 16:30:44,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:30:44,308 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 1867 transitions. [2022-02-18 16:30:44,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:30:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1867 transitions. [2022-02-18 16:30:44,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:30:44,309 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:30:44,309 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] [2022-02-18 16:30:44,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-02-18 16:30:44,511 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,SelfDestructingSolverStorable101 [2022-02-18 16:30:44,511 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:30:44,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:30:44,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2121405969, now seen corresponding path program 53 times [2022-02-18 16:30:44,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:30:44,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104723201] [2022-02-18 16:30:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:30:44,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:30:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:30:44,889 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:44,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:30:44,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104723201] [2022-02-18 16:30:44,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104723201] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:30:44,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688508467] [2022-02-18 16:30:44,889 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:30:44,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:44,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:30:44,890 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) [2022-02-18 16:30:44,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-02-18 16:30:44,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 16:30:44,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:30:44,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:30:44,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:30:45,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 377 treesize of output 329 [2022-02-18 16:30:45,732 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 297 treesize of output 257 [2022-02-18 16:30:45,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 257 treesize of output 221 [2022-02-18 16:30:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:46,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:30:46,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:30:46,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 161 treesize of output 151 [2022-02-18 16:30:46,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 151 treesize of output 141 [2022-02-18 16:30:47,961 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:47,961 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 445 treesize of output 401 [2022-02-18 16:30:48,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:48,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 392 treesize of output 340 [2022-02-18 16:30:48,478 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:48,478 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 332 treesize of output 304 [2022-02-18 16:30:48,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:48,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688508467] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:30:48,635 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:30:48,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:30:48,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726265396] [2022-02-18 16:30:48,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:30:48,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:30:48,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:30:48,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:30:48,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:30:48,635 INFO L87 Difference]: Start difference. First operand 592 states and 1867 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:30:54,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:30:54,247 INFO L93 Difference]: Finished difference Result 901 states and 2696 transitions. [2022-02-18 16:30:54,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-18 16:30:54,247 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:30:54,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:30:54,248 INFO L225 Difference]: With dead ends: 901 [2022-02-18 16:30:54,248 INFO L226 Difference]: Without dead ends: 856 [2022-02-18 16:30:54,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=485, Invalid=2377, Unknown=0, NotChecked=0, Total=2862 [2022-02-18 16:30:54,249 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 221 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 1219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 16:30:54,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 302 Invalid, 1219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1103 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-18 16:30:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-02-18 16:30:54,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 588. [2022-02-18 16:30:54,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 3.1533219761499147) internal successors, (1851), 587 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:30:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1851 transitions. [2022-02-18 16:30:54,256 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1851 transitions. Word has length 20 [2022-02-18 16:30:54,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:30:54,256 INFO L470 AbstractCegarLoop]: Abstraction has 588 states and 1851 transitions. [2022-02-18 16:30:54,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:30:54,256 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1851 transitions. [2022-02-18 16:30:54,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:30:54,257 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:30:54,257 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] [2022-02-18 16:30:54,273 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-02-18 16:30:54,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:54,467 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:30:54,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:30:54,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1390176651, now seen corresponding path program 54 times [2022-02-18 16:30:54,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:30:54,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848822335] [2022-02-18 16:30:54,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:30:54,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:30:54,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:30:54,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:54,809 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:30:54,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848822335] [2022-02-18 16:30:54,809 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848822335] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:30:54,809 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237359708] [2022-02-18 16:30:54,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:30:54,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:30:54,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:30:54,810 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) [2022-02-18 16:30:54,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-02-18 16:30:54,839 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 16:30:54,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:30:54,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:30:54,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:30:55,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 328 treesize of output 288 [2022-02-18 16:30:55,898 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 388 treesize of output 324 [2022-02-18 16:30:55,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 324 treesize of output 284 [2022-02-18 16:30:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:30:56,483 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:30:56,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 105 [2022-02-18 16:30:57,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 197 [2022-02-18 16:30:57,721 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 197 treesize of output 191 [2022-02-18 16:30:58,190 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:58,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 512 treesize of output 464 [2022-02-18 16:30:59,459 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:59,459 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 684 treesize of output 580 [2022-02-18 16:30:59,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:30:59,472 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 572 treesize of output 520 [2022-02-18 16:31:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:00,739 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237359708] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:31:00,739 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:31:00,739 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:31:00,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114687358] [2022-02-18 16:31:00,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:31:00,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:31:00,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:31:00,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:31:00,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:31:00,740 INFO L87 Difference]: Start difference. First operand 588 states and 1851 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:31:05,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:31:05,314 INFO L93 Difference]: Finished difference Result 1014 states and 3031 transitions. [2022-02-18 16:31:05,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-18 16:31:05,314 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 20 [2022-02-18 16:31:05,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:31:05,316 INFO L225 Difference]: With dead ends: 1014 [2022-02-18 16:31:05,316 INFO L226 Difference]: Without dead ends: 954 [2022-02-18 16:31:05,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=418, Invalid=2032, Unknown=0, NotChecked=0, Total=2450 [2022-02-18 16:31:05,316 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 174 mSDsluCounter, 743 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-18 16:31:05,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 406 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-18 16:31:05,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 954 states. [2022-02-18 16:31:05,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 954 to 593. [2022-02-18 16:31:05,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 3.1655405405405403) internal successors, (1874), 592 states have internal predecessors, (1874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:31:05,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1874 transitions. [2022-02-18 16:31:05,324 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1874 transitions. Word has length 20 [2022-02-18 16:31:05,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:31:05,324 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 1874 transitions. [2022-02-18 16:31:05,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:31:05,324 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1874 transitions. [2022-02-18 16:31:05,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:31:05,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:31:05,325 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] [2022-02-18 16:31:05,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-02-18 16:31:05,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-02-18 16:31:05,526 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:31:05,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:31:05,526 INFO L85 PathProgramCache]: Analyzing trace with hash 557079057, now seen corresponding path program 55 times [2022-02-18 16:31:05,526 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:31:05,526 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664955669] [2022-02-18 16:31:05,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:31:05,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:31:05,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:31:05,886 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:05,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:31:05,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664955669] [2022-02-18 16:31:05,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664955669] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:31:05,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906707292] [2022-02-18 16:31:05,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:31:05,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:31:05,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:31:05,888 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) [2022-02-18 16:31:05,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-02-18 16:31:05,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:31:05,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:31:05,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:31:06,151 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 244 treesize of output 216 [2022-02-18 16:31:06,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 343 treesize of output 295 [2022-02-18 16:31:06,487 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 295 treesize of output 251 [2022-02-18 16:31:07,037 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:07,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:31:07,333 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 113 treesize of output 103 [2022-02-18 16:31:07,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 133 [2022-02-18 16:31:07,681 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 133 treesize of output 123 [2022-02-18 16:31:08,326 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:08,326 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 273 treesize of output 245 [2022-02-18 16:31:09,039 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:09,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 524 treesize of output 448 [2022-02-18 16:31:09,046 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:09,047 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 440 treesize of output 396 [2022-02-18 16:31:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:09,332 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906707292] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:31:09,332 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:31:09,332 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:31:09,332 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75148382] [2022-02-18 16:31:09,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:31:09,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:31:09,332 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:31:09,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:31:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:31:09,333 INFO L87 Difference]: Start difference. First operand 593 states and 1874 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:31:11,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:31:11,371 INFO L93 Difference]: Finished difference Result 858 states and 2630 transitions. [2022-02-18 16:31:11,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-18 16:31:11,372 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:31:11,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:31:11,373 INFO L225 Difference]: With dead ends: 858 [2022-02-18 16:31:11,373 INFO L226 Difference]: Without dead ends: 843 [2022-02-18 16:31:11,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=430, Invalid=1732, Unknown=0, NotChecked=0, Total=2162 [2022-02-18 16:31:11,374 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 109 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1054 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 1156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 1054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:31:11,374 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 255 Invalid, 1156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 1054 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-18 16:31:11,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-02-18 16:31:11,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 591. [2022-02-18 16:31:11,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1677966101694914) internal successors, (1869), 590 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:31:11,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1869 transitions. [2022-02-18 16:31:11,381 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1869 transitions. Word has length 20 [2022-02-18 16:31:11,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:31:11,381 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 1869 transitions. [2022-02-18 16:31:11,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:31:11,381 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1869 transitions. [2022-02-18 16:31:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:31:11,381 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:31:11,382 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] [2022-02-18 16:31:11,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-02-18 16:31:11,582 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,SelfDestructingSolverStorable104 [2022-02-18 16:31:11,582 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:31:11,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:31:11,582 INFO L85 PathProgramCache]: Analyzing trace with hash 424161025, now seen corresponding path program 56 times [2022-02-18 16:31:11,582 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:31:11,582 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606637085] [2022-02-18 16:31:11,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:31:11,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:31:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:31:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:11,864 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:31:11,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606637085] [2022-02-18 16:31:11,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606637085] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:31:11,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328564996] [2022-02-18 16:31:11,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:31:11,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:31:11,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:31:11,865 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) [2022-02-18 16:31:11,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-02-18 16:31:11,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:31:11,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:31:11,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:31:11,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:31:12,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:31:12,113 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 290 treesize of output 242 [2022-02-18 16:31:12,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 353 treesize of output 305 [2022-02-18 16:31:12,526 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:31:12,526 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 305 treesize of output 265 [2022-02-18 16:31:13,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:13,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:31:13,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:31:13,752 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 161 treesize of output 151 [2022-02-18 16:31:13,754 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 151 treesize of output 141 [2022-02-18 16:31:14,699 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:14,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 523 treesize of output 459 [2022-02-18 16:31:15,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:15,497 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 388 treesize of output 348 [2022-02-18 16:31:15,504 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:15,504 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 340 treesize of output 296 [2022-02-18 16:31:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:15,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328564996] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:31:15,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:31:15,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-02-18 16:31:15,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137186880] [2022-02-18 16:31:15,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:31:15,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-18 16:31:15,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:31:15,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-18 16:31:15,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2022-02-18 16:31:15,983 INFO L87 Difference]: Start difference. First operand 591 states and 1869 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) [2022-02-18 16:31:17,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:31:17,700 INFO L93 Difference]: Finished difference Result 824 states and 2516 transitions. [2022-02-18 16:31:17,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-18 16:31:17,700 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 20 [2022-02-18 16:31:17,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:31:17,702 INFO L225 Difference]: With dead ends: 824 [2022-02-18 16:31:17,702 INFO L226 Difference]: Without dead ends: 809 [2022-02-18 16:31:17,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=273, Invalid=1059, Unknown=0, NotChecked=0, Total=1332 [2022-02-18 16:31:17,702 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:31:17,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 191 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:31:17,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2022-02-18 16:31:17,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 594. [2022-02-18 16:31:17,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 3.1720067453625633) internal successors, (1881), 593 states have internal predecessors, (1881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:31:17,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1881 transitions. [2022-02-18 16:31:17,709 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1881 transitions. Word has length 20 [2022-02-18 16:31:17,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:31:17,709 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 1881 transitions. [2022-02-18 16:31:17,710 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) [2022-02-18 16:31:17,710 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1881 transitions. [2022-02-18 16:31:17,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:31:17,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:31:17,710 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] [2022-02-18 16:31:17,726 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-02-18 16:31:17,911 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,SelfDestructingSolverStorable105 [2022-02-18 16:31:17,911 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:31:17,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:31:17,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1934214325, now seen corresponding path program 57 times [2022-02-18 16:31:17,911 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:31:17,911 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143558551] [2022-02-18 16:31:17,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:31:17,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:31:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:31:18,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:18,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:31:18,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143558551] [2022-02-18 16:31:18,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143558551] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:31:18,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108194420] [2022-02-18 16:31:18,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:31:18,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:31:18,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:31:18,318 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) [2022-02-18 16:31:18,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-02-18 16:31:18,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-18 16:31:18,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:31:18,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:31:18,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:31:18,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 299 treesize of output 251 [2022-02-18 16:31:19,314 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 275 treesize of output 239 [2022-02-18 16:31:19,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 239 treesize of output 207 [2022-02-18 16:31:19,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:19,695 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:31:20,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 145 treesize of output 135 [2022-02-18 16:31:20,998 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 245 treesize of output 235 [2022-02-18 16:31:21,000 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 235 treesize of output 225 [2022-02-18 16:31:21,374 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:21,374 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 523 treesize of output 459 [2022-02-18 16:31:22,115 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:22,115 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 334 treesize of output 302 [2022-02-18 16:31:22,122 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:22,122 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 258 [2022-02-18 16:31:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:22,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108194420] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:31:22,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:31:22,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:31:22,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070729407] [2022-02-18 16:31:22,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:31:22,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:31:22,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:31:22,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:31:22,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:31:22,645 INFO L87 Difference]: Start difference. First operand 594 states and 1881 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:31:24,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:31:24,344 INFO L93 Difference]: Finished difference Result 728 states and 2230 transitions. [2022-02-18 16:31:24,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-18 16:31:24,344 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:31:24,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:31:24,345 INFO L225 Difference]: With dead ends: 728 [2022-02-18 16:31:24,345 INFO L226 Difference]: Without dead ends: 698 [2022-02-18 16:31:24,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=195, Invalid=1137, Unknown=0, NotChecked=0, Total=1332 [2022-02-18 16:31:24,346 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 106 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:31:24,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 198 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 779 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:31:24,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2022-02-18 16:31:24,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 595. [2022-02-18 16:31:24,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 3.1734006734006734) internal successors, (1885), 594 states have internal predecessors, (1885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:31:24,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1885 transitions. [2022-02-18 16:31:24,352 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1885 transitions. Word has length 20 [2022-02-18 16:31:24,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:31:24,352 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1885 transitions. [2022-02-18 16:31:24,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:31:24,353 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1885 transitions. [2022-02-18 16:31:24,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:31:24,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:31:24,353 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] [2022-02-18 16:31:24,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-02-18 16:31:24,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:31:24,554 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:31:24,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:31:24,554 INFO L85 PathProgramCache]: Analyzing trace with hash 236714693, now seen corresponding path program 58 times [2022-02-18 16:31:24,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:31:24,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044218942] [2022-02-18 16:31:24,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:31:24,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:31:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:31:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:24,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:31:24,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044218942] [2022-02-18 16:31:24,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044218942] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:31:24,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545584340] [2022-02-18 16:31:24,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:31:24,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:31:24,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:31:24,982 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) [2022-02-18 16:31:24,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-02-18 16:31:25,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:31:25,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:31:25,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:31:25,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:31:25,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 301 treesize of output 265 [2022-02-18 16:31:25,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 265 treesize of output 225 [2022-02-18 16:31:25,611 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 225 treesize of output 197 [2022-02-18 16:31:26,079 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:26,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:31:26,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:31:27,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:27,143 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 424 treesize of output 368 [2022-02-18 16:31:27,879 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:27,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 334 treesize of output 298 [2022-02-18 16:31:27,886 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:27,886 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 290 treesize of output 258 [2022-02-18 16:31:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:28,301 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545584340] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:31:28,301 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:31:28,301 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:31:28,301 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534816490] [2022-02-18 16:31:28,301 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:31:28,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:31:28,302 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:31:28,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:31:28,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:31:28,302 INFO L87 Difference]: Start difference. First operand 595 states and 1885 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:31:30,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:31:30,123 INFO L93 Difference]: Finished difference Result 780 states and 2408 transitions. [2022-02-18 16:31:30,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-18 16:31:30,123 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:31:30,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:31:30,125 INFO L225 Difference]: With dead ends: 780 [2022-02-18 16:31:30,125 INFO L226 Difference]: Without dead ends: 765 [2022-02-18 16:31:30,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2022-02-18 16:31:30,125 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 107 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:31:30,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 246 Invalid, 1121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1057 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-18 16:31:30,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-02-18 16:31:30,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 591. [2022-02-18 16:31:30,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.1677966101694914) internal successors, (1869), 590 states have internal predecessors, (1869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:31:30,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1869 transitions. [2022-02-18 16:31:30,134 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1869 transitions. Word has length 20 [2022-02-18 16:31:30,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:31:30,134 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 1869 transitions. [2022-02-18 16:31:30,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:31:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1869 transitions. [2022-02-18 16:31:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:31:30,135 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:31:30,135 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] [2022-02-18 16:31:30,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-02-18 16:31:30,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-02-18 16:31:30,347 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:31:30,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:31:30,347 INFO L85 PathProgramCache]: Analyzing trace with hash -2040643295, now seen corresponding path program 59 times [2022-02-18 16:31:30,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:31:30,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087667321] [2022-02-18 16:31:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:31:30,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:31:30,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:31:30,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:30,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:31:30,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087667321] [2022-02-18 16:31:30,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087667321] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:31:30,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472457093] [2022-02-18 16:31:30,629 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:31:30,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:31:30,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:31:30,630 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) [2022-02-18 16:31:30,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-02-18 16:31:30,657 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:31:30,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:31:30,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 29 conjunts are in the unsatisfiable core [2022-02-18 16:31:30,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:31:30,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 281 treesize of output 233 [2022-02-18 16:31:31,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 310 treesize of output 274 [2022-02-18 16:31:31,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 274 treesize of output 234 [2022-02-18 16:31:31,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:31,683 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:31:31,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 113 treesize of output 103 [2022-02-18 16:31:32,312 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 145 treesize of output 135 [2022-02-18 16:31:32,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 125 [2022-02-18 16:31:32,994 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:32,994 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 456 treesize of output 416 [2022-02-18 16:31:33,527 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:33,528 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 305 treesize of output 265 [2022-02-18 16:31:33,535 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:33,547 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 236 treesize of output 208 [2022-02-18 16:31:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:33,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472457093] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:31:33,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:31:33,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:31:33,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370281432] [2022-02-18 16:31:33,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:31:33,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:31:33,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:31:33,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:31:33,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:31:33,716 INFO L87 Difference]: Start difference. First operand 591 states and 1869 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:31:34,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:31:34,851 INFO L93 Difference]: Finished difference Result 739 states and 2294 transitions. [2022-02-18 16:31:34,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-18 16:31:34,852 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:31:34,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:31:34,853 INFO L225 Difference]: With dead ends: 739 [2022-02-18 16:31:34,853 INFO L226 Difference]: Without dead ends: 724 [2022-02-18 16:31:34,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=227, Invalid=1105, Unknown=0, NotChecked=0, Total=1332 [2022-02-18 16:31:34,853 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 94 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-18 16:31:34,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 194 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-18 16:31:34,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-02-18 16:31:34,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 586. [2022-02-18 16:31:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.1675213675213674) internal successors, (1853), 585 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:31:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1853 transitions. [2022-02-18 16:31:34,860 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1853 transitions. Word has length 20 [2022-02-18 16:31:34,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:31:34,862 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1853 transitions. [2022-02-18 16:31:34,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:31:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1853 transitions. [2022-02-18 16:31:34,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:31:34,863 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:31:34,863 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] [2022-02-18 16:31:34,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-02-18 16:31:35,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:31:35,063 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:31:35,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:31:35,063 INFO L85 PathProgramCache]: Analyzing trace with hash 322520284, now seen corresponding path program 1 times [2022-02-18 16:31:35,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:31:35,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629690956] [2022-02-18 16:31:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:31:35,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:31:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:31:35,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:35,347 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:31:35,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629690956] [2022-02-18 16:31:35,347 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629690956] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:31:35,347 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410143705] [2022-02-18 16:31:35,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:31:35,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:31:35,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:31:35,348 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) [2022-02-18 16:31:35,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-02-18 16:31:35,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:31:35,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:31:35,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:31:35,884 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 413 treesize of output 353 [2022-02-18 16:31:37,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 586 treesize of output 510 [2022-02-18 16:31:37,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 510 treesize of output 450 [2022-02-18 16:31:37,637 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:37,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:31:38,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-02-18 16:31:38,519 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:38,519 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 227 treesize of output 207 [2022-02-18 16:31:39,182 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 22 treesize of output 20 [2022-02-18 16:31:39,403 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 383 treesize of output 361 [2022-02-18 16:31:39,410 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:31:39,410 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 361 treesize of output 320 [2022-02-18 16:31:39,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 317 treesize of output 277 [2022-02-18 16:31:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:39,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410143705] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:31:39,551 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:31:39,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:31:39,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362987183] [2022-02-18 16:31:39,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:31:39,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:31:39,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:31:39,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:31:39,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:31:39,551 INFO L87 Difference]: Start difference. First operand 586 states and 1853 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:31:52,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:31:52,117 INFO L93 Difference]: Finished difference Result 1052 states and 3066 transitions. [2022-02-18 16:31:52,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-18 16:31:52,117 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 20 [2022-02-18 16:31:52,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:31:52,119 INFO L225 Difference]: With dead ends: 1052 [2022-02-18 16:31:52,119 INFO L226 Difference]: Without dead ends: 778 [2022-02-18 16:31:52,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=1276, Invalid=4730, Unknown=0, NotChecked=0, Total=6006 [2022-02-18 16:31:52,119 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 270 mSDsluCounter, 1264 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 2173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:31:52,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 564 Invalid, 2173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2071 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-18 16:31:52,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2022-02-18 16:31:52,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 630. [2022-02-18 16:31:52,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 629 states have (on average 3.081081081081081) internal successors, (1938), 629 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:31:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1938 transitions. [2022-02-18 16:31:52,127 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1938 transitions. Word has length 20 [2022-02-18 16:31:52,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:31:52,127 INFO L470 AbstractCegarLoop]: Abstraction has 630 states and 1938 transitions. [2022-02-18 16:31:52,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:31:52,127 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1938 transitions. [2022-02-18 16:31:52,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:31:52,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:31:52,128 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] [2022-02-18 16:31:52,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-02-18 16:31:52,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:31:52,329 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:31:52,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:31:52,329 INFO L85 PathProgramCache]: Analyzing trace with hash 620721740, now seen corresponding path program 2 times [2022-02-18 16:31:52,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:31:52,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056760032] [2022-02-18 16:31:52,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:31:52,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:31:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:31:52,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:52,647 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:31:52,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056760032] [2022-02-18 16:31:52,647 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056760032] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:31:52,647 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197067586] [2022-02-18 16:31:52,647 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:31:52,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:31:52,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:31:52,648 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) [2022-02-18 16:31:52,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-02-18 16:31:52,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:31:52,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:31:52,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:31:52,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:31:53,540 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 564 treesize of output 504 [2022-02-18 16:31:54,718 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 1012 treesize of output 896 [2022-02-18 16:31:54,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 896 treesize of output 756 [2022-02-18 16:31:55,767 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:55,767 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:31:56,409 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:31:56,409 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 343 treesize of output 311 [2022-02-18 16:31:56,413 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 246 treesize of output 232 [2022-02-18 16:31:57,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:31:57,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 291 [2022-02-18 16:31:57,593 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:31:57,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 363 treesize of output 322 [2022-02-18 16:31:57,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 319 treesize of output 279 [2022-02-18 16:31:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:31:57,687 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197067586] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:31:57,687 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:31:57,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:31:57,688 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943927104] [2022-02-18 16:31:57,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:31:57,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:31:57,688 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:31:57,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:31:57,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=651, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:31:57,688 INFO L87 Difference]: Start difference. First operand 630 states and 1938 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:32:09,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:32:09,223 INFO L93 Difference]: Finished difference Result 979 states and 2726 transitions. [2022-02-18 16:32:09,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-18 16:32:09,223 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 20 [2022-02-18 16:32:09,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:32:09,224 INFO L225 Difference]: With dead ends: 979 [2022-02-18 16:32:09,224 INFO L226 Difference]: Without dead ends: 900 [2022-02-18 16:32:09,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=914, Invalid=3642, Unknown=0, NotChecked=0, Total=4556 [2022-02-18 16:32:09,225 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 314 mSDsluCounter, 900 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-18 16:32:09,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 434 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-18 16:32:09,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 900 states. [2022-02-18 16:32:09,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 900 to 653. [2022-02-18 16:32:09,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 652 states have (on average 3.065950920245399) internal successors, (1999), 652 states have internal predecessors, (1999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:32:09,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 1999 transitions. [2022-02-18 16:32:09,234 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 1999 transitions. Word has length 20 [2022-02-18 16:32:09,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:32:09,235 INFO L470 AbstractCegarLoop]: Abstraction has 653 states and 1999 transitions. [2022-02-18 16:32:09,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:32:09,235 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 1999 transitions. [2022-02-18 16:32:09,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:32:09,235 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:32:09,236 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] [2022-02-18 16:32:09,252 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-02-18 16:32:09,439 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,SelfDestructingSolverStorable110 [2022-02-18 16:32:09,439 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:32:09,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:32:09,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1098894230, now seen corresponding path program 3 times [2022-02-18 16:32:09,440 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:32:09,440 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296021175] [2022-02-18 16:32:09,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:32:09,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:32:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:32:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:09,725 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:32:09,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296021175] [2022-02-18 16:32:09,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296021175] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:32:09,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553818731] [2022-02-18 16:32:09,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:32:09,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:32:09,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:32:09,726 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) [2022-02-18 16:32:09,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-02-18 16:32:09,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-02-18 16:32:09,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:32:09,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:32:09,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:32:10,498 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 399 treesize of output 355 [2022-02-18 16:32:11,043 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 521 treesize of output 465 [2022-02-18 16:32:11,046 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 465 treesize of output 409 [2022-02-18 16:32:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:12,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:32:13,293 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:32:13,293 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 343 treesize of output 311 [2022-02-18 16:32:13,297 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 232 [2022-02-18 16:32:14,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:32:14,588 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 311 treesize of output 291 [2022-02-18 16:32:14,596 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:32:14,596 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 301 treesize of output 264 [2022-02-18 16:32:14,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 248 [2022-02-18 16:32:14,716 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:14,716 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553818731] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:32:14,716 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:32:14,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:32:14,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107784543] [2022-02-18 16:32:14,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:32:14,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:32:14,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:32:14,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:32:14,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:32:14,717 INFO L87 Difference]: Start difference. First operand 653 states and 1999 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:32:27,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:32:27,495 INFO L93 Difference]: Finished difference Result 1057 states and 2967 transitions. [2022-02-18 16:32:27,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-18 16:32:27,496 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 20 [2022-02-18 16:32:27,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:32:27,497 INFO L225 Difference]: With dead ends: 1057 [2022-02-18 16:32:27,497 INFO L226 Difference]: Without dead ends: 983 [2022-02-18 16:32:27,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=1203, Invalid=4497, Unknown=0, NotChecked=0, Total=5700 [2022-02-18 16:32:27,498 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 249 mSDsluCounter, 1109 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:32:27,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 537 Invalid, 1795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-18 16:32:27,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-02-18 16:32:27,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 675. [2022-02-18 16:32:27,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 674 states have (on average 3.0667655786350148) internal successors, (2067), 674 states have internal predecessors, (2067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:32:27,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 2067 transitions. [2022-02-18 16:32:27,507 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 2067 transitions. Word has length 20 [2022-02-18 16:32:27,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:32:27,507 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 2067 transitions. [2022-02-18 16:32:27,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:32:27,507 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 2067 transitions. [2022-02-18 16:32:27,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:32:27,508 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:32:27,508 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] [2022-02-18 16:32:27,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-02-18 16:32:27,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:32:27,709 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:32:27,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:32:27,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1417082444, now seen corresponding path program 4 times [2022-02-18 16:32:27,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:32:27,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752375282] [2022-02-18 16:32:27,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:32:27,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:32:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:32:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:28,023 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:32:28,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752375282] [2022-02-18 16:32:28,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752375282] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:32:28,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223280113] [2022-02-18 16:32:28,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:32:28,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:32:28,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:32:28,024 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) [2022-02-18 16:32:28,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-02-18 16:32:28,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:32:28,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:32:28,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:32:28,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:32:28,684 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 486 treesize of output 430 [2022-02-18 16:32:29,518 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 582 treesize of output 502 [2022-02-18 16:32:29,522 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 502 treesize of output 438 [2022-02-18 16:32:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:30,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:32:30,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 150 treesize of output 142 [2022-02-18 16:32:31,121 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:32:31,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 388 treesize of output 356 [2022-02-18 16:32:31,986 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:32:32,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 291 [2022-02-18 16:32:32,238 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:32:32,238 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 379 treesize of output 342 [2022-02-18 16:32:32,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 339 treesize of output 291 [2022-02-18 16:32:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:32,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223280113] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:32:32,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:32:32,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:32:32,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473476127] [2022-02-18 16:32:32,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:32:32,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:32:32,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:32:32,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:32:32,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:32:32,330 INFO L87 Difference]: Start difference. First operand 675 states and 2067 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:32:42,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:32:42,191 INFO L93 Difference]: Finished difference Result 974 states and 2780 transitions. [2022-02-18 16:32:42,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-18 16:32:42,191 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 20 [2022-02-18 16:32:42,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:32:42,193 INFO L225 Difference]: With dead ends: 974 [2022-02-18 16:32:42,193 INFO L226 Difference]: Without dead ends: 841 [2022-02-18 16:32:42,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=916, Invalid=4196, Unknown=0, NotChecked=0, Total=5112 [2022-02-18 16:32:42,193 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 205 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 1574 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-18 16:32:42,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 456 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1574 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-18 16:32:42,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2022-02-18 16:32:42,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 680. [2022-02-18 16:32:42,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 679 states have (on average 3.060382916053019) internal successors, (2078), 679 states have internal predecessors, (2078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:32:42,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 2078 transitions. [2022-02-18 16:32:42,201 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 2078 transitions. Word has length 20 [2022-02-18 16:32:42,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:32:42,201 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 2078 transitions. [2022-02-18 16:32:42,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:32:42,201 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 2078 transitions. [2022-02-18 16:32:42,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:32:42,202 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:32:42,202 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] [2022-02-18 16:32:42,218 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-02-18 16:32:42,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-02-18 16:32:42,403 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:32:42,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:32:42,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1261692342, now seen corresponding path program 5 times [2022-02-18 16:32:42,403 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:32:42,403 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255731830] [2022-02-18 16:32:42,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:32:42,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:32:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:32:42,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:42,747 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:32:42,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255731830] [2022-02-18 16:32:42,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255731830] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:32:42,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998997025] [2022-02-18 16:32:42,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:32:42,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:32:42,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:32:42,749 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) [2022-02-18 16:32:42,750 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-02-18 16:32:42,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:32:42,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:32:42,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:32:42,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:32:43,593 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 514 treesize of output 450 [2022-02-18 16:32:44,446 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 618 treesize of output 534 [2022-02-18 16:32:44,450 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 534 treesize of output 474 [2022-02-18 16:32:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:45,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:32:46,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-02-18 16:32:46,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:32:46,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 153 [2022-02-18 16:32:46,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:32:46,979 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:32:46,979 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 206 treesize of output 177 [2022-02-18 16:32:46,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 171 [2022-02-18 16:32:46,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2022-02-18 16:32:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:32:47,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998997025] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:32:47,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:32:47,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-02-18 16:32:47,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530651377] [2022-02-18 16:32:47,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:32:47,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-18 16:32:47,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:32:47,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-18 16:32:47,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-02-18 16:32:47,011 INFO L87 Difference]: Start difference. First operand 680 states and 2078 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:33:06,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:33:06,627 INFO L93 Difference]: Finished difference Result 1623 states and 4356 transitions. [2022-02-18 16:33:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-18 16:33:06,627 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-02-18 16:33:06,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:33:06,629 INFO L225 Difference]: With dead ends: 1623 [2022-02-18 16:33:06,630 INFO L226 Difference]: Without dead ends: 1411 [2022-02-18 16:33:06,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3437 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=2746, Invalid=9026, Unknown=0, NotChecked=0, Total=11772 [2022-02-18 16:33:06,630 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 410 mSDsluCounter, 1612 mSDsCounter, 0 mSdLazyCounter, 2265 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 2265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-18 16:33:06,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 815 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 2265 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-18 16:33:06,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2022-02-18 16:33:06,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 739. [2022-02-18 16:33:06,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.1151761517615175) internal successors, (2299), 738 states have internal predecessors, (2299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:33:06,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2299 transitions. [2022-02-18 16:33:06,642 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2299 transitions. Word has length 20 [2022-02-18 16:33:06,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:33:06,642 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2299 transitions. [2022-02-18 16:33:06,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:33:06,642 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2299 transitions. [2022-02-18 16:33:06,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:33:06,643 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:33:06,643 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] [2022-02-18 16:33:06,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-02-18 16:33:06,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-02-18 16:33:06,843 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:33:06,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:33:06,843 INFO L85 PathProgramCache]: Analyzing trace with hash -2067314148, now seen corresponding path program 6 times [2022-02-18 16:33:06,844 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:33:06,844 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327329055] [2022-02-18 16:33:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:33:06,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:33:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:33:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:33:07,152 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:33:07,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327329055] [2022-02-18 16:33:07,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327329055] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:33:07,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995316087] [2022-02-18 16:33:07,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:33:07,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:33:07,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:33:07,153 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) [2022-02-18 16:33:07,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-02-18 16:33:07,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-18 16:33:07,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:33:07,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:33:07,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:33:07,929 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 781 treesize of output 669 [2022-02-18 16:33:09,063 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 436 treesize of output 380 [2022-02-18 16:33:09,066 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 380 treesize of output 336 [2022-02-18 16:33:09,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:33:09,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:33:10,229 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:33:10,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 291 treesize of output 263 [2022-02-18 16:33:10,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 232 [2022-02-18 16:33:10,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:33:10,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 291 [2022-02-18 16:33:10,819 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:33:10,819 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 301 treesize of output 264 [2022-02-18 16:33:10,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 250 [2022-02-18 16:33:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:33:10,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995316087] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:33:10,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:33:10,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:33:10,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489803203] [2022-02-18 16:33:10,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:33:10,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:33:10,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:33:10,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:33:10,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:33:10,943 INFO L87 Difference]: Start difference. First operand 739 states and 2299 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:33:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:33:21,691 INFO L93 Difference]: Finished difference Result 1186 states and 3456 transitions. [2022-02-18 16:33:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-18 16:33:21,691 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 20 [2022-02-18 16:33:21,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:33:21,693 INFO L225 Difference]: With dead ends: 1186 [2022-02-18 16:33:21,693 INFO L226 Difference]: Without dead ends: 1007 [2022-02-18 16:33:21,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1035, Invalid=3657, Unknown=0, NotChecked=0, Total=4692 [2022-02-18 16:33:21,694 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 236 mSDsluCounter, 970 mSDsCounter, 0 mSdLazyCounter, 1551 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 1633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-18 16:33:21,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 472 Invalid, 1633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1551 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-18 16:33:21,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2022-02-18 16:33:21,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 776. [2022-02-18 16:33:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.089032258064516) internal successors, (2394), 775 states have internal predecessors, (2394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:33:21,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2394 transitions. [2022-02-18 16:33:21,704 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2394 transitions. Word has length 20 [2022-02-18 16:33:21,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:33:21,704 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 2394 transitions. [2022-02-18 16:33:21,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:33:21,704 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2394 transitions. [2022-02-18 16:33:21,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:33:21,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:33:21,705 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] [2022-02-18 16:33:21,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-02-18 16:33:21,919 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,SelfDestructingSolverStorable114 [2022-02-18 16:33:21,919 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:33:21,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:33:21,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1844082580, now seen corresponding path program 7 times [2022-02-18 16:33:21,920 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:33:21,920 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827165236] [2022-02-18 16:33:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:33:21,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:33:21,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:33:22,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:33:22,184 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:33:22,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827165236] [2022-02-18 16:33:22,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827165236] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:33:22,184 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238767128] [2022-02-18 16:33:22,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:33:22,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:33:22,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:33:22,185 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) [2022-02-18 16:33:22,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-02-18 16:33:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:33:22,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:33:22,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:33:23,067 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 564 treesize of output 504 [2022-02-18 16:33:24,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 472 treesize of output 416 [2022-02-18 16:33:24,629 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 416 treesize of output 370 [2022-02-18 16:33:25,109 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:33:25,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:33:25,745 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:33:25,746 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 343 treesize of output 311 [2022-02-18 16:33:25,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 246 treesize of output 232 [2022-02-18 16:33:26,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:33:26,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 291 [2022-02-18 16:33:26,661 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:33:26,661 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 301 treesize of output 264 [2022-02-18 16:33:26,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 250 [2022-02-18 16:33:26,794 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:33:26,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238767128] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:33:26,794 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:33:26,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:33:26,794 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848221561] [2022-02-18 16:33:26,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:33:26,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:33:26,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:33:26,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:33:26,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:33:26,795 INFO L87 Difference]: Start difference. First operand 776 states and 2394 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:33:34,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:33:34,354 INFO L93 Difference]: Finished difference Result 999 states and 2919 transitions. [2022-02-18 16:33:34,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-18 16:33:34,354 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 20 [2022-02-18 16:33:34,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:33:34,356 INFO L225 Difference]: With dead ends: 999 [2022-02-18 16:33:34,356 INFO L226 Difference]: Without dead ends: 939 [2022-02-18 16:33:34,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=678, Invalid=2982, Unknown=0, NotChecked=0, Total=3660 [2022-02-18 16:33:34,356 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 221 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 1423 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-18 16:33:34,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 410 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1423 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-18 16:33:34,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 939 states. [2022-02-18 16:33:34,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 939 to 784. [2022-02-18 16:33:34,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.0893997445721584) internal successors, (2419), 783 states have internal predecessors, (2419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:33:34,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2419 transitions. [2022-02-18 16:33:34,366 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2419 transitions. Word has length 20 [2022-02-18 16:33:34,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:33:34,366 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 2419 transitions. [2022-02-18 16:33:34,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:33:34,366 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2419 transitions. [2022-02-18 16:33:34,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:33:34,367 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:33:34,368 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] [2022-02-18 16:33:34,384 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-02-18 16:33:34,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:33:34,568 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:33:34,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:33:34,568 INFO L85 PathProgramCache]: Analyzing trace with hash 731268746, now seen corresponding path program 8 times [2022-02-18 16:33:34,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:33:34,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73045217] [2022-02-18 16:33:34,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:33:34,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:33:34,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:33:34,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:33:34,844 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:33:34,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73045217] [2022-02-18 16:33:34,844 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73045217] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:33:34,844 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853077909] [2022-02-18 16:33:34,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:33:34,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:33:34,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:33:34,845 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) [2022-02-18 16:33:34,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-02-18 16:33:34,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:33:34,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:33:34,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:33:34,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:33:35,652 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 514 treesize of output 450 [2022-02-18 16:33:36,946 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 938 treesize of output 842 [2022-02-18 16:33:36,951 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 842 treesize of output 718 [2022-02-18 16:33:38,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:33:38,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:33:39,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:33:39,406 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 343 treesize of output 311 [2022-02-18 16:33:39,411 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 246 treesize of output 232 [2022-02-18 16:33:40,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:33:40,782 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 311 treesize of output 291 [2022-02-18 16:33:40,789 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:33:40,790 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 301 treesize of output 264 [2022-02-18 16:33:40,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 248 [2022-02-18 16:33:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:33:40,931 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853077909] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:33:40,931 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:33:40,931 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:33:40,931 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988372101] [2022-02-18 16:33:40,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:33:40,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:33:40,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:33:40,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:33:40,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:33:40,932 INFO L87 Difference]: Start difference. First operand 784 states and 2419 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:33:50,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:33:50,603 INFO L93 Difference]: Finished difference Result 1089 states and 3114 transitions. [2022-02-18 16:33:50,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-18 16:33:50,603 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 20 [2022-02-18 16:33:50,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:33:50,605 INFO L225 Difference]: With dead ends: 1089 [2022-02-18 16:33:50,605 INFO L226 Difference]: Without dead ends: 1016 [2022-02-18 16:33:50,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1263 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1042, Invalid=3788, Unknown=0, NotChecked=0, Total=4830 [2022-02-18 16:33:50,605 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 280 mSDsluCounter, 897 mSDsCounter, 0 mSdLazyCounter, 1400 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-18 16:33:50,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 433 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1400 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-18 16:33:50,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-02-18 16:33:50,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 788. [2022-02-18 16:33:50,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 788 states, 787 states have (on average 3.0864040660736975) internal successors, (2429), 787 states have internal predecessors, (2429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:33:50,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 788 states to 788 states and 2429 transitions. [2022-02-18 16:33:50,615 INFO L78 Accepts]: Start accepts. Automaton has 788 states and 2429 transitions. Word has length 20 [2022-02-18 16:33:50,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:33:50,615 INFO L470 AbstractCegarLoop]: Abstraction has 788 states and 2429 transitions. [2022-02-18 16:33:50,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:33:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 788 states and 2429 transitions. [2022-02-18 16:33:50,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:33:50,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:33:50,616 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] [2022-02-18 16:33:50,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-02-18 16:33:50,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:33:50,819 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:33:50,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:33:50,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1047721876, now seen corresponding path program 9 times [2022-02-18 16:33:50,819 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:33:50,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768817194] [2022-02-18 16:33:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:33:50,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:33:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:33:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:33:51,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:33:51,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768817194] [2022-02-18 16:33:51,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768817194] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:33:51,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508914743] [2022-02-18 16:33:51,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:33:51,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:33:51,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:33:51,109 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) [2022-02-18 16:33:51,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-02-18 16:33:51,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-18 16:33:51,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:33:51,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:33:51,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:33:51,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 446 treesize of output 378 [2022-02-18 16:33:52,433 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 766 treesize of output 646 [2022-02-18 16:33:52,437 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 646 treesize of output 574 [2022-02-18 16:33:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:33:53,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:33:53,585 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 135 treesize of output 127 [2022-02-18 16:33:54,185 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:33:54,186 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 395 treesize of output 363 [2022-02-18 16:33:55,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:33:55,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 291 [2022-02-18 16:33:55,291 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:33:55,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 301 treesize of output 264 [2022-02-18 16:33:55,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 287 treesize of output 247 [2022-02-18 16:33:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:33:55,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508914743] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:33:55,418 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:33:55,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:33:55,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995812238] [2022-02-18 16:33:55,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:33:55,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:33:55,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:33:55,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:33:55,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:33:55,419 INFO L87 Difference]: Start difference. First operand 788 states and 2429 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:34:01,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:34:01,957 INFO L93 Difference]: Finished difference Result 952 states and 2809 transitions. [2022-02-18 16:34:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-18 16:34:01,957 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 20 [2022-02-18 16:34:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:34:01,959 INFO L225 Difference]: With dead ends: 952 [2022-02-18 16:34:01,959 INFO L226 Difference]: Without dead ends: 875 [2022-02-18 16:34:01,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=624, Invalid=2682, Unknown=0, NotChecked=0, Total=3306 [2022-02-18 16:34:01,959 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 188 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 1727 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-18 16:34:01,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 511 Invalid, 1778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1727 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-18 16:34:01,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2022-02-18 16:34:01,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 793. [2022-02-18 16:34:01,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 3.080808080808081) internal successors, (2440), 792 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:34:01,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 2440 transitions. [2022-02-18 16:34:01,968 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 2440 transitions. Word has length 20 [2022-02-18 16:34:01,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:34:01,968 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 2440 transitions. [2022-02-18 16:34:01,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:34:01,968 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 2440 transitions. [2022-02-18 16:34:01,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:34:01,969 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:34:01,969 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] [2022-02-18 16:34:01,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-02-18 16:34:02,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2022-02-18 16:34:02,171 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:34:02,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:34:02,171 INFO L85 PathProgramCache]: Analyzing trace with hash 568470634, now seen corresponding path program 10 times [2022-02-18 16:34:02,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:34:02,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533185280] [2022-02-18 16:34:02,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:34:02,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:34:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:34:02,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:34:02,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:34:02,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533185280] [2022-02-18 16:34:02,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533185280] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:34:02,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266056707] [2022-02-18 16:34:02,458 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:34:02,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:34:02,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:34:02,459 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) [2022-02-18 16:34:02,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-02-18 16:34:02,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:34:02,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:34:02,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:34:02,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:34:03,299 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 514 treesize of output 450 [2022-02-18 16:34:04,189 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 565 treesize of output 505 [2022-02-18 16:34:04,193 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 505 treesize of output 433 [2022-02-18 16:34:05,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:34:05,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:34:05,939 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 300 treesize of output 284 [2022-02-18 16:34:06,496 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:34:06,496 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 402 treesize of output 370 [2022-02-18 16:34:07,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:34:07,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 291 [2022-02-18 16:34:07,477 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:34:07,477 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 301 treesize of output 264 [2022-02-18 16:34:07,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 250 [2022-02-18 16:34:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:34:07,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266056707] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:34:07,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:34:07,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:34:07,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402332677] [2022-02-18 16:34:07,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:34:07,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:34:07,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:34:07,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:34:07,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:34:07,599 INFO L87 Difference]: Start difference. First operand 793 states and 2440 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:34:16,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:34:16,949 INFO L93 Difference]: Finished difference Result 1112 states and 3150 transitions. [2022-02-18 16:34:16,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-18 16:34:16,949 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 20 [2022-02-18 16:34:16,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:34:16,951 INFO L225 Difference]: With dead ends: 1112 [2022-02-18 16:34:16,951 INFO L226 Difference]: Without dead ends: 1009 [2022-02-18 16:34:16,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1535 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1191, Invalid=4509, Unknown=0, NotChecked=0, Total=5700 [2022-02-18 16:34:16,951 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 234 mSDsluCounter, 1047 mSDsCounter, 0 mSdLazyCounter, 1626 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 1709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-18 16:34:16,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 519 Invalid, 1709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1626 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-18 16:34:16,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2022-02-18 16:34:16,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 784. [2022-02-18 16:34:16,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 3.106002554278416) internal successors, (2432), 783 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:34:16,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 2432 transitions. [2022-02-18 16:34:16,961 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 2432 transitions. Word has length 20 [2022-02-18 16:34:16,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:34:16,961 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 2432 transitions. [2022-02-18 16:34:16,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:34:16,961 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 2432 transitions. [2022-02-18 16:34:16,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:34:16,962 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:34:16,962 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] [2022-02-18 16:34:16,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-02-18 16:34:17,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-02-18 16:34:17,163 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:34:17,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:34:17,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1184772738, now seen corresponding path program 11 times [2022-02-18 16:34:17,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:34:17,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831275180] [2022-02-18 16:34:17,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:34:17,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:34:17,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:34:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:34:17,483 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:34:17,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831275180] [2022-02-18 16:34:17,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831275180] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:34:17,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830888492] [2022-02-18 16:34:17,484 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:34:17,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:34:17,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:34:17,485 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) [2022-02-18 16:34:17,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-02-18 16:34:17,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:34:17,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:34:17,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:34:17,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:34:18,163 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 872 treesize of output 792 [2022-02-18 16:34:20,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 530 treesize of output 470 [2022-02-18 16:34:20,428 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 470 treesize of output 406 [2022-02-18 16:34:21,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:34:21,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:34:21,725 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 28 treesize of output 24 [2022-02-18 16:34:22,019 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:34:22,247 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:34:22,247 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 231 treesize of output 211 [2022-02-18 16:34:23,078 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:34:23,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 294 treesize of output 257 [2022-02-18 16:34:23,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 254 treesize of output 222 [2022-02-18 16:34:23,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 79 [2022-02-18 16:34:23,184 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:34:23,184 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830888492] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:34:23,185 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:34:23,185 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-02-18 16:34:23,185 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58470767] [2022-02-18 16:34:23,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:34:23,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-18 16:34:23,185 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:34:23,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-18 16:34:23,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-02-18 16:34:23,185 INFO L87 Difference]: Start difference. First operand 784 states and 2432 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:34:37,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:34:37,035 INFO L93 Difference]: Finished difference Result 1460 states and 3974 transitions. [2022-02-18 16:34:37,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-18 16:34:37,036 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-02-18 16:34:37,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:34:37,038 INFO L225 Difference]: With dead ends: 1460 [2022-02-18 16:34:37,038 INFO L226 Difference]: Without dead ends: 1217 [2022-02-18 16:34:37,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=1258, Invalid=3998, Unknown=0, NotChecked=0, Total=5256 [2022-02-18 16:34:37,038 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 388 mSDsluCounter, 1145 mSDsCounter, 0 mSdLazyCounter, 1767 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 1884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:34:37,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [388 Valid, 532 Invalid, 1884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1767 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-18 16:34:37,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2022-02-18 16:34:37,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 740. [2022-02-18 16:34:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 3.0554803788903926) internal successors, (2258), 739 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:34:37,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 2258 transitions. [2022-02-18 16:34:37,049 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 2258 transitions. Word has length 20 [2022-02-18 16:34:37,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:34:37,049 INFO L470 AbstractCegarLoop]: Abstraction has 740 states and 2258 transitions. [2022-02-18 16:34:37,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:34:37,049 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 2258 transitions. [2022-02-18 16:34:37,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:34:37,050 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:34:37,050 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] [2022-02-18 16:34:37,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-02-18 16:34:37,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:34:37,250 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:34:37,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:34:37,250 INFO L85 PathProgramCache]: Analyzing trace with hash 789282754, now seen corresponding path program 12 times [2022-02-18 16:34:37,250 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:34:37,250 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702928836] [2022-02-18 16:34:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:34:37,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:34:37,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:34:37,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:34:37,591 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:34:37,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702928836] [2022-02-18 16:34:37,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702928836] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:34:37,591 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999118569] [2022-02-18 16:34:37,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:34:37,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:34:37,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:34:37,593 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) [2022-02-18 16:34:37,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-02-18 16:34:37,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-02-18 16:34:37,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:34:37,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:34:37,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:34:38,286 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 816 treesize of output 716 [2022-02-18 16:34:40,870 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 944 treesize of output 812 [2022-02-18 16:34:40,875 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 812 treesize of output 722 [2022-02-18 16:34:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:34:43,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:34:44,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 105 [2022-02-18 16:34:44,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 300 treesize of output 284 [2022-02-18 16:34:45,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:34:45,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 153 [2022-02-18 16:34:45,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 291 [2022-02-18 16:34:45,749 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:34:45,749 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 301 treesize of output 264 [2022-02-18 16:34:45,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 288 treesize of output 248 [2022-02-18 16:34:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:34:45,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999118569] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:34:45,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:34:45,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:34:45,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551871581] [2022-02-18 16:34:45,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:34:45,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:34:45,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:34:45,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:34:45,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:34:45,885 INFO L87 Difference]: Start difference. First operand 740 states and 2258 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:34:55,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:34:55,295 INFO L93 Difference]: Finished difference Result 987 states and 2751 transitions. [2022-02-18 16:34:55,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-18 16:34:55,296 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 20 [2022-02-18 16:34:55,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:34:55,297 INFO L225 Difference]: With dead ends: 987 [2022-02-18 16:34:55,297 INFO L226 Difference]: Without dead ends: 820 [2022-02-18 16:34:55,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=593, Invalid=1759, Unknown=0, NotChecked=0, Total=2352 [2022-02-18 16:34:55,297 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 396 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 1080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-18 16:34:55,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [396 Valid, 311 Invalid, 1080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-18 16:34:55,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-02-18 16:34:55,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 729. [2022-02-18 16:34:55,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 729 states, 728 states have (on average 3.0631868131868134) internal successors, (2230), 728 states have internal predecessors, (2230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:34:55,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 729 states to 729 states and 2230 transitions. [2022-02-18 16:34:55,305 INFO L78 Accepts]: Start accepts. Automaton has 729 states and 2230 transitions. Word has length 20 [2022-02-18 16:34:55,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:34:55,305 INFO L470 AbstractCegarLoop]: Abstraction has 729 states and 2230 transitions. [2022-02-18 16:34:55,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:34:55,305 INFO L276 IsEmpty]: Start isEmpty. Operand 729 states and 2230 transitions. [2022-02-18 16:34:55,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:34:55,306 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:34:55,306 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] [2022-02-18 16:34:55,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-02-18 16:34:55,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:34:55,507 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:34:55,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:34:55,507 INFO L85 PathProgramCache]: Analyzing trace with hash 500990636, now seen corresponding path program 13 times [2022-02-18 16:34:55,507 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:34:55,507 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118406631] [2022-02-18 16:34:55,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:34:55,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:34:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:34:55,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:34:55,792 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:34:55,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118406631] [2022-02-18 16:34:55,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118406631] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:34:55,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590975248] [2022-02-18 16:34:55,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:34:55,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:34:55,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:34:55,794 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) [2022-02-18 16:34:55,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-02-18 16:34:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:34:55,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:34:55,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:34:56,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 564 treesize of output 504 [2022-02-18 16:34:57,787 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 713 treesize of output 629 [2022-02-18 16:34:57,791 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 629 treesize of output 565 [2022-02-18 16:34:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:34:58,978 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:34:59,624 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:34:59,624 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 343 treesize of output 311 [2022-02-18 16:34:59,628 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 246 treesize of output 232 [2022-02-18 16:35:00,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:35:00,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 291 [2022-02-18 16:35:00,816 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:35:00,816 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 301 treesize of output 264 [2022-02-18 16:35:00,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 250 [2022-02-18 16:35:00,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:35:00,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590975248] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:35:00,942 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:35:00,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:35:00,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556400652] [2022-02-18 16:35:00,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:35:00,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:35:00,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:35:00,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:35:00,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:35:00,942 INFO L87 Difference]: Start difference. First operand 729 states and 2230 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:35:13,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:35:13,285 INFO L93 Difference]: Finished difference Result 1055 states and 2924 transitions. [2022-02-18 16:35:13,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-18 16:35:13,286 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 20 [2022-02-18 16:35:13,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:35:13,287 INFO L225 Difference]: With dead ends: 1055 [2022-02-18 16:35:13,287 INFO L226 Difference]: Without dead ends: 957 [2022-02-18 16:35:13,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1451 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1113, Invalid=4143, Unknown=0, NotChecked=0, Total=5256 [2022-02-18 16:35:13,288 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 295 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 1078 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:35:13,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 362 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1078 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 16:35:13,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 957 states. [2022-02-18 16:35:13,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 957 to 730. [2022-02-18 16:35:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 730 states, 729 states have (on average 3.063100137174211) internal successors, (2233), 729 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:35:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 730 states to 730 states and 2233 transitions. [2022-02-18 16:35:13,297 INFO L78 Accepts]: Start accepts. Automaton has 730 states and 2233 transitions. Word has length 20 [2022-02-18 16:35:13,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:35:13,297 INFO L470 AbstractCegarLoop]: Abstraction has 730 states and 2233 transitions. [2022-02-18 16:35:13,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:35:13,297 INFO L276 IsEmpty]: Start isEmpty. Operand 730 states and 2233 transitions. [2022-02-18 16:35:13,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:35:13,298 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:35:13,298 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] [2022-02-18 16:35:13,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-02-18 16:35:13,511 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,SelfDestructingSolverStorable121 [2022-02-18 16:35:13,511 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:35:13,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:35:13,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1381630932, now seen corresponding path program 14 times [2022-02-18 16:35:13,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:35:13,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204308546] [2022-02-18 16:35:13,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:35:13,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:35:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:35:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:35:13,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:35:13,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204308546] [2022-02-18 16:35:13,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204308546] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:35:13,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058636008] [2022-02-18 16:35:13,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-18 16:35:13,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:35:13,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:35:13,941 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) [2022-02-18 16:35:13,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-02-18 16:35:13,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-18 16:35:13,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:35:13,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:35:13,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:35:14,774 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 816 treesize of output 716 [2022-02-18 16:35:17,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 724 treesize of output 652 [2022-02-18 16:35:17,163 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 652 treesize of output 560 [2022-02-18 16:35:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:35:18,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:35:19,178 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 115 treesize of output 105 [2022-02-18 16:35:19,382 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 300 treesize of output 284 [2022-02-18 16:35:20,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:35:20,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 403 treesize of output 371 [2022-02-18 16:35:21,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 380 treesize of output 358 [2022-02-18 16:35:21,286 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:35:21,286 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 358 treesize of output 317 [2022-02-18 16:35:21,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 314 treesize of output 274 [2022-02-18 16:35:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:35:21,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058636008] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:35:21,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:35:21,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:35:21,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483201421] [2022-02-18 16:35:21,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:35:21,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:35:21,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:35:21,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:35:21,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:35:21,422 INFO L87 Difference]: Start difference. First operand 730 states and 2233 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:35:29,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:35:29,051 INFO L93 Difference]: Finished difference Result 1303 states and 3616 transitions. [2022-02-18 16:35:29,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-18 16:35:29,051 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 20 [2022-02-18 16:35:29,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:35:29,053 INFO L225 Difference]: With dead ends: 1303 [2022-02-18 16:35:29,053 INFO L226 Difference]: Without dead ends: 1209 [2022-02-18 16:35:29,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=751, Invalid=3031, Unknown=0, NotChecked=0, Total=3782 [2022-02-18 16:35:29,053 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 339 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-18 16:35:29,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 403 Invalid, 1351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-18 16:35:29,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2022-02-18 16:35:29,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 752. [2022-02-18 16:35:29,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 751 states have (on average 3.0798934753661786) internal successors, (2313), 751 states have internal predecessors, (2313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:35:29,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 2313 transitions. [2022-02-18 16:35:29,063 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 2313 transitions. Word has length 20 [2022-02-18 16:35:29,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:35:29,063 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 2313 transitions. [2022-02-18 16:35:29,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:35:29,063 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 2313 transitions. [2022-02-18 16:35:29,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:35:29,064 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:35:29,064 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] [2022-02-18 16:35:29,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-02-18 16:35:29,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2022-02-18 16:35:29,265 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:35:29,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:35:29,265 INFO L85 PathProgramCache]: Analyzing trace with hash 908302434, now seen corresponding path program 15 times [2022-02-18 16:35:29,265 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:35:29,265 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548606686] [2022-02-18 16:35:29,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:35:29,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:35:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:35:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:35:29,598 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:35:29,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548606686] [2022-02-18 16:35:29,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548606686] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:35:29,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874900440] [2022-02-18 16:35:29,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-18 16:35:29,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:35:29,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:35:29,599 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) [2022-02-18 16:35:29,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-02-18 16:35:29,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-02-18 16:35:29,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:35:29,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:35:29,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:35:30,089 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 515 treesize of output 463 [2022-02-18 16:35:32,358 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 525 treesize of output 469 [2022-02-18 16:35:32,361 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 469 treesize of output 405 [2022-02-18 16:35:33,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:35:33,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:35:33,778 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 105 [2022-02-18 16:35:34,024 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:35:34,024 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 293 treesize of output 265 [2022-02-18 16:35:34,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 248 treesize of output 234 [2022-02-18 16:35:34,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 291 [2022-02-18 16:35:34,481 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:35:34,481 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 301 treesize of output 264 [2022-02-18 16:35:34,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 250 [2022-02-18 16:35:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:35:34,609 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874900440] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:35:34,609 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:35:34,609 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:35:34,609 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125145797] [2022-02-18 16:35:34,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:35:34,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:35:34,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:35:34,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:35:34,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:35:34,609 INFO L87 Difference]: Start difference. First operand 752 states and 2313 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:35:51,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:35:51,657 INFO L93 Difference]: Finished difference Result 1131 states and 3186 transitions. [2022-02-18 16:35:51,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-18 16:35:51,658 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 20 [2022-02-18 16:35:51,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:35:51,659 INFO L225 Difference]: With dead ends: 1131 [2022-02-18 16:35:51,659 INFO L226 Difference]: Without dead ends: 878 [2022-02-18 16:35:51,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=1200, Invalid=4202, Unknown=0, NotChecked=0, Total=5402 [2022-02-18 16:35:51,660 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 250 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 1868 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 559 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-18 16:35:51,660 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 559 Invalid, 1985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1868 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-18 16:35:51,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2022-02-18 16:35:51,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 717. [2022-02-18 16:35:51,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 717 states, 716 states have (on average 3.058659217877095) internal successors, (2190), 716 states have internal predecessors, (2190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:35:51,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 717 states to 717 states and 2190 transitions. [2022-02-18 16:35:51,669 INFO L78 Accepts]: Start accepts. Automaton has 717 states and 2190 transitions. Word has length 20 [2022-02-18 16:35:51,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:35:51,669 INFO L470 AbstractCegarLoop]: Abstraction has 717 states and 2190 transitions. [2022-02-18 16:35:51,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:35:51,669 INFO L276 IsEmpty]: Start isEmpty. Operand 717 states and 2190 transitions. [2022-02-18 16:35:51,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:35:51,670 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:35:51,670 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] [2022-02-18 16:35:51,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-02-18 16:35:51,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-02-18 16:35:51,870 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:35:51,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:35:51,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1081659596, now seen corresponding path program 16 times [2022-02-18 16:35:51,871 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:35:51,871 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749357946] [2022-02-18 16:35:51,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:35:51,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:35:51,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:35:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:35:52,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:35:52,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749357946] [2022-02-18 16:35:52,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749357946] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:35:52,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396990606] [2022-02-18 16:35:52,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-18 16:35:52,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:35:52,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:35:52,206 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) [2022-02-18 16:35:52,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-02-18 16:35:52,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-18 16:35:52,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:35:52,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:35:52,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:35:52,826 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 371 treesize of output 327 [2022-02-18 16:35:53,500 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 472 treesize of output 424 [2022-02-18 16:35:53,503 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 424 treesize of output 368 [2022-02-18 16:35:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:35:54,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:35:55,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:35:55,123 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 343 treesize of output 311 [2022-02-18 16:35:55,127 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 246 treesize of output 232 [2022-02-18 16:35:56,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:35:56,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 311 treesize of output 291 [2022-02-18 16:35:56,477 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:35:56,477 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 301 treesize of output 264 [2022-02-18 16:35:56,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 250 [2022-02-18 16:35:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:35:56,599 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396990606] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:35:56,599 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:35:56,599 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-02-18 16:35:56,599 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74412681] [2022-02-18 16:35:56,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:35:56,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-18 16:35:56,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:35:56,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-18 16:35:56,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2022-02-18 16:35:56,600 INFO L87 Difference]: Start difference. First operand 717 states and 2190 transitions. Second operand has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:36:00,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:36:00,728 INFO L93 Difference]: Finished difference Result 874 states and 2518 transitions. [2022-02-18 16:36:00,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-18 16:36:00,729 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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 20 [2022-02-18 16:36:00,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:36:00,730 INFO L225 Difference]: With dead ends: 874 [2022-02-18 16:36:00,730 INFO L226 Difference]: Without dead ends: 818 [2022-02-18 16:36:00,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=518, Invalid=2032, Unknown=0, NotChecked=0, Total=2550 [2022-02-18 16:36:00,731 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 169 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-18 16:36:00,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 387 Invalid, 1347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-18 16:36:00,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818 states. [2022-02-18 16:36:00,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818 to 714. [2022-02-18 16:36:00,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 3.0603085553997196) internal successors, (2182), 713 states have internal predecessors, (2182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:36:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2182 transitions. [2022-02-18 16:36:00,738 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2182 transitions. Word has length 20 [2022-02-18 16:36:00,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:36:00,739 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 2182 transitions. [2022-02-18 16:36:00,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8571428571428572) internal successors, (52), 28 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) [2022-02-18 16:36:00,739 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2182 transitions. [2022-02-18 16:36:00,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:36:00,739 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:36:00,740 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] [2022-02-18 16:36:00,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-02-18 16:36:00,940 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,SelfDestructingSolverStorable124 [2022-02-18 16:36:00,940 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:36:00,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:36:00,941 INFO L85 PathProgramCache]: Analyzing trace with hash 918861484, now seen corresponding path program 17 times [2022-02-18 16:36:00,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:36:00,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253942029] [2022-02-18 16:36:00,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:36:00,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:36:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:36:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:36:01,256 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:36:01,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253942029] [2022-02-18 16:36:01,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253942029] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:36:01,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210979849] [2022-02-18 16:36:01,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-18 16:36:01,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:36:01,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:36:01,257 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) [2022-02-18 16:36:01,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-02-18 16:36:01,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-02-18 16:36:01,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:36:01,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:36:01,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:36:01,868 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 371 treesize of output 323 [2022-02-18 16:36:02,405 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 438 treesize of output 382 [2022-02-18 16:36:02,408 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 382 treesize of output 338 [2022-02-18 16:36:03,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:36:03,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:36:03,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-02-18 16:36:03,894 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:36:03,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 171 treesize of output 155 [2022-02-18 16:36:04,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:36:04,341 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-02-18 16:36:04,341 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 206 treesize of output 177 [2022-02-18 16:36:04,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 203 treesize of output 171 [2022-02-18 16:36:04,349 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 11 treesize of output 7 [2022-02-18 16:36:04,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:36:04,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210979849] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:36:04,372 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:36:04,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-02-18 16:36:04,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608484597] [2022-02-18 16:36:04,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:36:04,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-18 16:36:04,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:36:04,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-18 16:36:04,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2022-02-18 16:36:04,374 INFO L87 Difference]: Start difference. First operand 714 states and 2182 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:36:12,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:36:12,292 INFO L93 Difference]: Finished difference Result 1137 states and 3150 transitions. [2022-02-18 16:36:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-18 16:36:12,293 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have 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 [2022-02-18 16:36:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:36:12,294 INFO L225 Difference]: With dead ends: 1137 [2022-02-18 16:36:12,294 INFO L226 Difference]: Without dead ends: 1029 [2022-02-18 16:36:12,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=884, Invalid=3406, Unknown=0, NotChecked=0, Total=4290 [2022-02-18 16:36:12,295 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 281 mSDsluCounter, 1187 mSDsCounter, 0 mSdLazyCounter, 1916 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-18 16:36:12,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 612 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1916 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-18 16:36:12,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2022-02-18 16:36:12,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 716. [2022-02-18 16:36:12,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 3.0895104895104897) internal successors, (2209), 715 states have internal predecessors, (2209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:36:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 2209 transitions. [2022-02-18 16:36:12,304 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 2209 transitions. Word has length 20 [2022-02-18 16:36:12,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:36:12,304 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 2209 transitions. [2022-02-18 16:36:12,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:36:12,304 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 2209 transitions. [2022-02-18 16:36:12,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:36:12,305 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:36:12,305 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] [2022-02-18 16:36:12,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-02-18 16:36:12,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-02-18 16:36:12,506 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:36:12,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:36:12,506 INFO L85 PathProgramCache]: Analyzing trace with hash 711739980, now seen corresponding path program 18 times [2022-02-18 16:36:12,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:36:12,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226854806] [2022-02-18 16:36:12,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:36:12,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:36:12,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:36:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:36:12,766 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:36:12,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226854806] [2022-02-18 16:36:12,766 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226854806] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:36:12,766 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207156250] [2022-02-18 16:36:12,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-18 16:36:12,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:36:12,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:36:12,767 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) [2022-02-18 16:36:12,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-02-18 16:36:12,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-02-18 16:36:12,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-18 16:36:12,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:36:12,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:36:13,630 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:36:13,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 399 treesize of output 343 [2022-02-18 16:36:14,958 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 535 treesize of output 473 [2022-02-18 16:36:14,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:36:14,963 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 473 treesize of output 413 [2022-02-18 16:36:15,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:36:15,525 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:36:16,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 20 [2022-02-18 16:36:16,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:36:16,410 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 398 treesize of output 362 [2022-02-18 16:36:17,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2022-02-18 16:36:17,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:36:17,510 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 222 treesize of output 206 [2022-02-18 16:36:17,516 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:36:17,516 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 198 treesize of output 178 [2022-02-18 16:36:17,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 156 [2022-02-18 16:36:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:36:17,907 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207156250] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:36:17,907 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:36:17,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:36:17,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831780647] [2022-02-18 16:36:17,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:36:17,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:36:17,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:36:17,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:36:17,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:36:17,908 INFO L87 Difference]: Start difference. First operand 716 states and 2209 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:36:26,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-18 16:36:26,508 INFO L93 Difference]: Finished difference Result 1326 states and 3727 transitions. [2022-02-18 16:36:26,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-18 16:36:26,509 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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 20 [2022-02-18 16:36:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-18 16:36:26,510 INFO L225 Difference]: With dead ends: 1326 [2022-02-18 16:36:26,510 INFO L226 Difference]: Without dead ends: 1169 [2022-02-18 16:36:26,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1306 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=977, Invalid=4135, Unknown=0, NotChecked=0, Total=5112 [2022-02-18 16:36:26,511 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 320 mSDsluCounter, 1194 mSDsCounter, 0 mSdLazyCounter, 1513 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 569 SdHoareTripleChecker+Invalid, 1883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 1513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-18 16:36:26,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [320 Valid, 569 Invalid, 1883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 1513 Invalid, 0 Unknown, 283 Unchecked, 0.9s Time] [2022-02-18 16:36:26,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-02-18 16:36:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 749. [2022-02-18 16:36:26,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 3.078877005347594) internal successors, (2303), 748 states have internal predecessors, (2303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-18 16:36:26,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 2303 transitions. [2022-02-18 16:36:26,521 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 2303 transitions. Word has length 20 [2022-02-18 16:36:26,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-18 16:36:26,521 INFO L470 AbstractCegarLoop]: Abstraction has 749 states and 2303 transitions. [2022-02-18 16:36:26,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) [2022-02-18 16:36:26,521 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 2303 transitions. [2022-02-18 16:36:26,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-18 16:36:26,522 INFO L506 BasicCegarLoop]: Found error trace [2022-02-18 16:36:26,522 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] [2022-02-18 16:36:26,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-02-18 16:36:26,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:36:26,724 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-02-18 16:36:26,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-18 16:36:26,725 INFO L85 PathProgramCache]: Analyzing trace with hash 580611050, now seen corresponding path program 19 times [2022-02-18 16:36:26,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-18 16:36:26,725 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279826871] [2022-02-18 16:36:26,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-18 16:36:26,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-18 16:36:26,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:36:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:36:27,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-18 16:36:27,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279826871] [2022-02-18 16:36:27,004 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279826871] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-18 16:36:27,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506838264] [2022-02-18 16:36:27,004 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-02-18 16:36:27,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-18 16:36:27,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-18 16:36:27,005 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) [2022-02-18 16:36:27,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-02-18 16:36:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-18 16:36:27,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2022-02-18 16:36:27,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-18 16:36:27,614 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 373 treesize of output 325 [2022-02-18 16:36:28,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:36:28,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 858 treesize of output 766 [2022-02-18 16:36:28,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-02-18 16:36:28,727 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 766 treesize of output 650 [2022-02-18 16:36:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:36:29,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-18 16:36:29,875 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 22 treesize of output 20 [2022-02-18 16:36:30,111 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:36:30,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 389 treesize of output 353 [2022-02-18 16:36:31,152 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 138 treesize of output 130 [2022-02-18 16:36:31,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 236 treesize of output 218 [2022-02-18 16:36:31,486 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:36:31,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 218 treesize of output 198 [2022-02-18 16:36:31,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-02-18 16:36:31,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 174 [2022-02-18 16:36:31,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-18 16:36:31,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506838264] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-18 16:36:31,838 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-18 16:36:31,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-02-18 16:36:31,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060828373] [2022-02-18 16:36:31,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-18 16:36:31,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-18 16:36:31,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-18 16:36:31,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-18 16:36:31,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-02-18 16:36:31,839 INFO L87 Difference]: Start difference. First operand 749 states and 2303 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 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) Received shutdown request... [2022-02-18 16:36:35,475 WARN L244 SmtUtils]: Removed 16 from assertion stack [2022-02-18 16:36:35,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-18 16:36:35,476 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=490, Invalid=1862, Unknown=0, NotChecked=0, Total=2352 [2022-02-18 16:36:35,477 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 77 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 1044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-18 16:36:35,477 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 164 Invalid, 1044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-18 16:36:35,479 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-02-18 16:36:35,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-02-18 16:36:35,500 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 [2022-02-18 16:36:35,517 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-02-18 16:36:35,687 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,SelfDestructingSolverStorable127 [2022-02-18 16:36:35,687 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (749states) and FLOYD_HOARE automaton (currently 30 states, 27 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 137 for 60ms.. [2022-02-18 16:36:35,689 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-02-18 16:36:35,689 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-02-18 16:36:35,689 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-02-18 16:36:35,691 INFO L732 BasicCegarLoop]: Path program histogram: [59, 19, 6, 6, 6, 6, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-02-18 16:36:35,692 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-02-18 16:36:35,692 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-18 16:36:35,694 INFO L202 PluginConnector]: Adding new model poker-hand-subst.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.02 04:36:35 BasicIcfg [2022-02-18 16:36:35,694 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-18 16:36:35,694 INFO L158 Benchmark]: Toolchain (without parser) took 730989.05ms. Allocated memory was 185.6MB in the beginning and 553.6MB in the end (delta: 368.1MB). Free memory was 141.1MB in the beginning and 310.8MB in the end (delta: -169.7MB). Peak memory consumption was 199.2MB. Max. memory is 8.0GB. [2022-02-18 16:36:35,694 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.11ms. Allocated memory is still 185.6MB. Free memory was 143.6MB in the beginning and 143.5MB in the end (delta: 72.9kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-18 16:36:35,694 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.51ms. Allocated memory is still 185.6MB. Free memory was 141.0MB in the beginning and 139.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-18 16:36:35,694 INFO L158 Benchmark]: Boogie Preprocessor took 25.85ms. Allocated memory is still 185.6MB. Free memory was 139.3MB in the beginning and 137.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-18 16:36:35,694 INFO L158 Benchmark]: RCFGBuilder took 510.07ms. Allocated memory is still 185.6MB. Free memory was 137.3MB in the beginning and 147.3MB in the end (delta: -9.9MB). Peak memory consumption was 26.3MB. Max. memory is 8.0GB. [2022-02-18 16:36:35,694 INFO L158 Benchmark]: TraceAbstraction took 730411.71ms. Allocated memory was 185.6MB in the beginning and 553.6MB in the end (delta: 368.1MB). Free memory was 146.7MB in the beginning and 310.8MB in the end (delta: -164.1MB). Peak memory consumption was 203.4MB. Max. memory is 8.0GB. [2022-02-18 16:36:35,694 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 0.11ms. Allocated memory is still 185.6MB. Free memory was 143.6MB in the beginning and 143.5MB in the end (delta: 72.9kB). There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 35.51ms. Allocated memory is still 185.6MB. Free memory was 141.0MB in the beginning and 139.3MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.85ms. Allocated memory is still 185.6MB. Free memory was 139.3MB in the beginning and 137.4MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 510.07ms. Allocated memory is still 185.6MB. Free memory was 137.3MB in the beginning and 147.3MB in the end (delta: -9.9MB). Peak memory consumption was 26.3MB. Max. memory is 8.0GB. * TraceAbstraction took 730411.71ms. Allocated memory was 185.6MB in the beginning and 553.6MB in the end (delta: 368.1MB). Free memory was 146.7MB in the beginning and 310.8MB in the end (delta: -164.1MB). Peak memory consumption was 203.4MB. 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: 299]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (749states) and FLOYD_HOARE automaton (currently 30 states, 27 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 137 for 60ms.. - TimeoutResultAtElement [Line: 289]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (749states) and FLOYD_HOARE automaton (currently 30 states, 27 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 137 for 60ms.. - TimeoutResultAtElement [Line: 292]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (749states) and FLOYD_HOARE automaton (currently 30 states, 27 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 137 for 60ms.. - TimeoutResultAtElement [Line: 293]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (749states) and FLOYD_HOARE automaton (currently 30 states, 27 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 137 for 60ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 44 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 730.3s, OverallIterations: 128, TraceHistogramMax: 1, PathProgramHistogramMax: 59, EmptinessCheckTime: 0.1s, AutomataDifference: 358.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 16020 SdHoareTripleChecker+Valid, 57.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 16020 mSDsluCounter, 27824 SdHoareTripleChecker+Invalid, 49.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 1470 IncrementalHoareTripleChecker+Unchecked, 59449 mSDsCounter, 6421 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 105485 IncrementalHoareTripleChecker+Invalid, 113376 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6421 mSolverCounterUnsat, 2635 mSDtfsCounter, 105485 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 6101 GetRequests, 2132 SyntacticMatches, 77 SemanticMatches, 3891 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52784 ImplicationChecksByTransitivity, 360.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=793occurred in iteration=118, InterpolantAutomatonStates: 2460, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.1s AutomataMinimizationTime, 127 MinimizatonAttempts, 28714 StatesRemovedByMinimization, 121 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.2s SatisfiabilityAnalysisTime, 349.1s InterpolantComputationTime, 4050 NumberOfCodeBlocks, 4046 NumberOfCodeBlocksAsserted, 297 NumberOfCheckSat, 5394 ConstructedInterpolants, 28 QuantifiedInterpolants, 257291 SizeOfPredicates, 1884 NumberOfNonLiveVariables, 6822 ConjunctsInSsa, 2397 ConjunctsInUnsatCore, 296 InterpolantComputations, 45 PerfectInterpolantSequences, 54/770 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